I played BotW a lot, and really loved it. I feel like the beginning of the game was relatively easy compared to TotK, I died a few times trying out things, discovering the game and possibilities ; in TotK I died a lot and still do even with good gear and armour (1*-2* armors, 30-40+ damage weapons).
You could say it's skill issues and I would agree with you as I am not a pro player and play games once a week maybe, however I feel like the difficulty curve is far greater in TotK.
That has affected how I view the game to the point that sometimes I think I dislike it (even though the new powers are the best thing they could have added, with the verticality of the world) ; that might also have to do with the much darker ambiance of the game, which can feel frightening (to me) to the point going underground is hard.
Is it just me? Should I just "git gud"?
I don't think the game is particularly more difficult in terms of mechanics.
It just has more enemies that deal more damage per hit.
However, I've hardly got any extra hearts, but the game never 1-hit-kills you. So as long as you eat plenty of food, you'll always be okay.
Enemies can be very spongey if you don't engage in the fusing mechanic. I've found crowd control weapons to be the best. Topaz, opal, ruby and all those are great. Combine them for bonus elemental damage. Freeze this biggest baddie and kill the fodder with some generic spear you made.