I began writing this comment with the intention of answering your question, but it actually ended up mainly being me venting myself.
Obviously no, it’s never been a flawless experience, but a few months back I decided I wanted to try gaming so I put an nvidia card in my pc and reinstalled linux to start fresh. All of the examples you’ve given sound like the sort of problems I’ve had since then, but never in the ten years before when I was using intel integrated graphics. I was aware going in that nvidia is massively more problematic than AMD, but this card was a spare from someone I know.
Obviously there are games I can run well now that were unrealistic before, but there are also a couple 2D games with SNES-quality graphics that I’ve tried which spike my CPU to 100% and lag like crap in spite of working perfectly before I installed the card. I’ve had two experiences where a game suddenly has issues immediately after an update to the nvidia-utils package. I’m not new to linux, but I am new to gaming on it and I’ve kind of given up on troubleshooting this stuff in favor of “maybe there will be an update tomorrow that fixes this”.
There’s reason for optimism, everyone is saying the situation is steadily improving because nvidia has been much more cooperative in the past couple years. It’s not realistic to say you won’t find annoyances regardless, but it wouldn’t surprise me if over half of your struggles are a direct result of decades of one company’s deliberate decision to ignore pleas to stop making life as hard as they possibly can on software developers trying to support their hardware.
Often when I upset strangers online I feel bad and log out for a few months.