How about some big strategy games? Turn-based strategy I mean, not RTS games (which can sometimes be more about wild clicking than anything else).
I've been really diving into them myself, and they really are very different from the instant-gratification of action games. Because you cant just slap something down and it instantly works. No, you gotta put a plan in place, get all the pieces together, THINK about it, carefully execute.
Have you ever tried a 4x game? Civilization 6 is the biggest example right now (everyone just loves it), but there's also games like Age of Wonders 4 (which is what I'm really into right now), Galactic Civilizations 4 (which isnt the same series as Civ 6), Master of Orion, Endless Legend, TONS of others. 4x games are really big/popular right now. There's a lot of space themed games, and a lot of historical themed games, people freaking love both. Sometimes a fantasy theme, like with AoW 4 or Endless Legend.
There's also grand strategy games, stuff like Crusader Kings, Hearts of Iron, or Stellaris. Those are much harder to learn though. I'd suggest playing 4x games a bit before trying these. But, these are absolutely worth the effort to learn, seriously. There's brilliant stuff here. These are really good about theme, too, immersing you into it more. As
@Judge mentioned about Hearts of Iron, these technically move in real time, but are very slow paced, you can turn up or down the game speed however much you like, or pause whenever you want (and you can still give orders/commands when paused). You wont be controlling like, 50 billion little units or anything. Just like with 4x games, these arent JUST about war & combat. You can succeed through peace & diplomacy too. Or, you know, maybe a bit of sneaky chronic backstabbing, if you like. EDIT: Got Hearts of Iron confused, that one really is focused on war and such.
Or if you want more of a war-focused game, with units and formations and supply lines and all that stuff, Shadow Empire is amazing. It's much harder to learn though. Also Dominions 6, but that's probably the most confusing of all of them.
There's a ton of complexity and fun to be had with ANY of these, and you need to slow down and THINK about what you're doing. It's very much "delayed gratification" like
@honeytoast said. Like, if you want to build some unit or structure or whatever, often you poke the things to do it, like "Okay I want this passenger ship" but it takes time to make, so you wont actually GET it until 7 turns later. The genre as a whole seriously forces you to slow down. Strategy and planning instead of immediate punching. Exactly part of why I'm playing it lately myself.
Or sandbox games, I'll second that recommendation too. Something like Minecraft or Terraria or whatever. You get fast paced moments in them, like fighting skeletons and whatnot, but a LOT of the experience of these is slower paced stuff. Exploring, mining, pursuing longer goals and such. Like, that minecart track through that mountain you want to make, you cant just hit a button and BAM, it's done. Gotta get all the things you need, plan out how you're going to do it, mine through it, set up the tracks, and there's creativity all the way through.
ALL of these games also tend to have a lot of mods, too, so if you're into game modding, you can customize your experience, if you'd like. You dont have to though. They're all super good without mods.
That's the sort of stuff I'd suggest. These are all wildly different from the anxiety factories that the RTS genre can be at times (yeah, they get me all anxious and agitated too, since I really hate being rushed, so I dont play those).
I'm trying to train my brain for delayed gratification..it's painful though
Totally worth doing though, at least I think so.
And you'll find some real fun stuff as you go, that you maybe never expected.