Man f**k razer

If I had to take a guess, it's probably the most complex mechanical part in a mouse. The other buttons don't have the added extra movements. I've had the same Razor Deathadder for like 15 years, still going strong. I'm just glad they don't have actual rolling balls in them anymore.

Yup, for me it is the middle click the reason I'm buying new mice.
Tho I don't think many people are actually aware of the utility of the roller click. This is why I usually pass the broken ones down to my family lol

100% of my failed Logitech mouses were left clicks.

I've had good luck with rubbing alcohol to remove the gooey mess. You'll end up with bare plastic instead of the rubber grip, but that's an improvement over sticky.

I use the middle click extensively. Probably as much as left click. I've never had it fail. Usually one of the side buttons goes first

In my case, it's always the Logitech mouse cable.

Didn't really use it that often, and it stopped working right as I was playing Sekiro, which was annoying because I had to remap the target button elsewhere

I use middle click navigating my browser, but I also rebind Reload to MMB in every shooter game I can. I’ve been through more mice than I can remember since I started rebinding it but most of them were actually replaced for other reasons. I’ve only had 2 with faulty middle-clicks since probably 2020

Nope. Right click every time.

Finally bought a mouse with optical switches.

Yeah, though this time my g502 is starting to fail with mouse wheel tilt click

Attempted fixing my wheel click a bunch of times by cleaning and lubricating the microswitch, it would improve for a while and go back to how it was. Missed clicks, multiple clicks, etc.

My mouse has a bunch of smaller buttons all over it, I ended up binding wheel click to a smaller button near the right button until I found a microswitch that suited, but I'm just really comfortable with the way I have it now.

Also, depending on the type of rubber coating, cleaning with isopropyl alcohol may help with the stickiness.

I replaced my last mouse because the mmb was getting excessively squeaky and wouldn't scroll unless depressed, which made map navigation/zooming in certain games difficult.

It's a shame they don't use the same tech used in the cell phone screens. Not putting a screen, only the sensor. My cell phone is working good after years of use.

Mine failed that way, yeah. Though I think it was user error after trying to repair a mouse that wasn't designed to be serviced officially. All the rubber wore off the wing, so I had to disassemble and replace it with a generic part. The left and right clicks are a bit spongy now, and middle click only intermittently works now, but the mouse is grippy again. I wish more mice were actually repairable.

It's annoying to have mice that break down and need to be repurchased instead of a few replacement parts. 90% of the mouse was fine.

For me, yes

Nope. The he only issues I've ever had were with the left button.

All of my mice that have failed have failed abruptly and totally. There's no warning or buttons failing, one day you plug it in and the computer doesn't recognize it anymore

Middle click? Jokes on you I use a trackball.

Try to open the mouse and clean it sometimes dust/lint gets trapped and causes this.

I seem to always kill m1 and get a new mouse every 5 years

I've killed dozens of mice and in every single one, left-clicking was the first to break.

Nope, it's either right click or the goddamn scroll that fails.

The first mouse that failed on me failed because my cat chewed the cable and damaged it. I recently had my 2nd mouse failure, my Kensington wireless trackball died. Seems to be a power issue. I think I can fix it, we'll see. Never had a mouse button fail on me yet.

The middle scroll wheel on my mouse creaks like a 19th century door while scrolling and clicking, and of course not repairable...

I got a mouse like a year ago from a brand called Rapoo (never heard of them), and it was a solid mouse that supported standard dongle wireless as well as BT, and it is quite nice ergonomically compared to the Logitech one I’ve got for another computer.

Then I started having issues with left click, with it surprisingly often clicking twice (or more) or not clicking at all, which is causing me to accidentally close every app open just because it double/triple/quadruple clicked somehow. Then there’s middle click, which works slightly better, it only skips sometimes, but the Logitech mentioned earlier is the one I heavily use middle click (since I close and open browser tabs using it very often), and that one is pretty close to actually just failing.

Not sure why, but the most recent mice have just worked like shit, with both of these being brand new. As a comparison, I’ve got 2 Microsoft arc touch mice (the old one with a dedicated touchpad for the scroll area but not the buttons,) and I used both for school, with friends snapping it between their postures hundreds of times out of curiosity, which they’ve sustained really well, and no buttons have gotten issues apart from the touchpad of one of them, which likes to deactivate when I scroll too much which is plain inconvenient.

On my current mouse it's the scrollwheel that's slowly failing but middle click works fine. There's also a box of non-functional mice in my house. Last time I checked it contained one mouse with broken middle click, one with broken left click and one with broken right click. So I guess I disagree with your theory.

The cable is the first thing to go for me, but i find that to be a repairable issue.

I find the middle click button awkward to use so I typically rebind the forward side button to middle click

So far I had no mice break on me. And my most used buttons on the mouse are probably left, middle and then right clicking (I like opening new tabs instead of going back and forth).

Maybe too much pressure you put on your buttons?
Edit: I had 5 mice (at home)
Roccat Kova
Roccat Kone XTD (I think)
Logitech Mx Master 2s, 3 and 3s.

And I replaced the MX Master mice only because the rubber coating got sticky and I RMA'd it with Logitech support.

I use a touch pad, so I don't have this problem