My suggestion would be to try and find an indie game that scratches your itch. Maybe try Splitgate if you haven't already.
Splitgate isn't an indie game and I already have Halo which is essentially the same thing, no thanks.
EDIT: Before someone says "if you try it you'll like it": I played back a few months after Splitgate first launched on Steam in 2019, before they relaunched it as Splitgate beta and changed the logo and then the game blew up.
It wasn't as popular back then and I don't remember it being particularly remarkable.
After the game started doing well (for a time, at least) the developers did
something and now the performance is... very poor for a game of this style. Also they gave me zero of the promised early supporter rewards for playing the game in it's first year when nobody cared about it, which is a slap in the face. "You're one of a few thousand who helped us gain traction. Anyway, we don't care, fuck you."
The design of the game is lazy: level design is alright but it's literally just Halo with a portal gun and even though it's fun it does next to nothing to hold my interest. Most people I know who've played it stopped caring after only a month.
Being a Halo clone, Splitgate is also a console-eqse arena shooter. CS is a tactical shooter meant for mouse and keyboard. The two play
very very different, Splitgate will never scratch that same itch.
Yes, I've tried Valorant. Also played it when it was fairly new. I don't have much against it gameplay wise but I stopped playing because for a while Unreal Engine was not playing nice with my network card. Also, no ultrawide support and their anticheat is annoying. I've been a CS guy for years now, something about the purity, fluidness, and simplicity with underlying complexity makes it thrilling, in the same way Unreal never quite lived up to the legacy of Quake in my mind. Finding a different game to replace CS outside of just Valorant is
hard.
For map suggestions, if you don't have one already I'd suggest a map that takes place on a high floor of a fancy office building/office building lobby. I know there's a couple of maps like this for CS already (at least for CS:GO), but I like the idea of mundane and neatly-organized city spaces being used for skirmishes.
That's cs_office. It's fun to mess around in but at a high skill level it's extremely T-sided and the chokepoints are terrible when you have more than 2 people camping T spawn. Office isn't in the Premier map pool for this reason. It's more of a goof around map, and as the only hostage map in CS2 it gets old quickly.
When I play CS Source this is fine, since most of the maps are made by novices for the sole purpose of being casual hangout spaces, so it's what I come to expect. I think I've played on de_nipperhouse a lot recently and that's always been fun. It's just that when I want to play the game as a team, those types of maps that aren't dynamic enough for good team strategy don't hold my interest.