idk where you looked, protondb.com is a good database for this stuff, from your later reply insurgency sandstorm and hund showdown are both "gold" rated, they should be okay
but the thing is ... you could just try for yourself, for free
i have just recently found out that from ps4 and xbox one up you can play fortnite and a bunch of other f2p titles, without subscription and with mouse and keyboard, with crossplay to every other platform
i have an older desktop with 10, it doesn't have tpm, but there is a slot, i could get one and upgrade but also i mostly use linux on it
but i still feel like i'm going to lose something and it stresses me out a bit
a "compatibility issue" would be if the website didn't load or display incorrectly, but as others pointed out, if you change your "user agent" (the code that tells websites what os and brower you use) to windows, it runs perfectly well
also, piss off, nobody's saying there are no difficulties
just get an extra ssd, install mint or pop (or both on separate partitions) and try
there is a learning curve, and there's always new stuff, more depth, but imo the above two are fairly easy to understand. pop is more osx-like both in looks but also, it's somewhat locked down, which can feel limiting but it keeps things simple. i've been using it in the last few years daily. i was using mint before that, i started daily driving linux with it, but i managed to mess it up enough that every game was struggling to run lol, but i played hl:alyx on there without an issue for example
nvidia doesn't make the best linux drivers, but some think they are completely unusable but actually it just means that there are some games that are glitchy or slow, for instance forza horizon runs better on my steam deck than my rtx 2080. although recently it went from 20-30 fps to 30-40, so it will get better at some point
edit: actually, the above was last week, there were some updates and it's a sputtery 60 fps now
next build will have an amd card for sure, but nvidia is mostly usable too. the "anti-cheat" blockade is more frustrating imo
i got a 4 a few years back and it's still works great, still gets security updates. it still has the default android on it, so i've been looking into alternatives but it seems complicated. then again, i managed to switch to linux on pc so maybe it's not so bad
fyi you can use the deck restore image on an amd build, although probably there will be complications https://help.steampowered.com/en/faqs/view/1b71-edf2-eb6d-2bb3#reimage
afaik chimeraos is the recommended alternative, which is a fork of the current steamos, with more supported hw (but not nvidia)
there is a link to the tweet in the description
she posted a "w" gif after this response
i thought it would be deleted, but i guess it's full on mask off time already
idk where you looked, protondb.com is a good database for this stuff, from your later reply insurgency sandstorm and hund showdown are both "gold" rated, they should be okay
but the thing is ... you could just try for yourself, for free