Very insightful. I found something similar as I made peace with the fact that I already have more games than I am able to get to the table. So now I focus on enjoying the games that I do get to play and not stressing out about the games that don’t make it.
That and I also stopped buying new games unless there is a very specific reason for me to do so (e.g. my latest pickup was Flash Point because my son is old enough to get it and is obsessed with firefighting).
I would suggest starting with a couple of games that are easy to justify getting rid of and seeing how that makes you feel. There is a FB group for buy/sell/trade that seems very effective for that.
I found Dungeon Petz very well designed but too heavy for my liking – felt totally burnt out by the end of the game. Good game but asks too much for my liking.