Sounds like it's time for some correcthorsebatterystaple!

Use a passphrase (not a password) and a physical security key, like a yubikey. It also supports TOTP or whatever 2fa Proton uses, you just connect it with a laptop or phone and it gives you a key.

A physical key is much more secure than 2fa from a password manager (although both are probably fine)

In my opinion the centralization of all your data and secrets to one single company is itself a security risk. When I realized that, I completely stopped using proton. I see 2 main issues with using all-proton: 1. they could turn evil (like a lot of big companies do) 2. They can have exploits which then can effect all your data / secrets. I switched to have a different company for each service and I don't really pay more than what I would have to pay proton to get the same things.

I use all of Proton’s products as well. I’ve found a Yubikey works best for the 2FA codes. I’m also working on having a backup password manager

Im in the same boat. They really need to allow a second password for the pass database.