The fun to time spent ratio is too little. Yes, you will have a few moments of fun but that is over thousands of hour. It's simply not a good experience and I completely understand the need to connect with other people, I am not oblivious. Yes, you should do that but live service games isn't the only way to do it. There are other ways to do it.

I get too addicted in trying to figure out all the moveset and I start to figure out what the exact combos are and spend days just trying to practice more and more, even if it's just vs. an AI.
Fighting/Wrestling games are really fun if you play with real people in your house given no one is a sweaty try hard. When no one actually knows the controls or tries to outsmart the person in the house, it's a really fun experience, otherwise what I said in the PvP games above applies.

First Person Shooters(FPS)→ Games where you see via the player's eyes. Here flicking to the exact spot on the screen matters above everything. Some examples are CS, Valorant & even PUBG.
Yes, you can play a get good with a controller, but by that logic, you can also get good with a pen tablet but everytime there is shooting mechanic in a game and you have some sort of freedom(ignoring turn based games here), using a mouse makes a lot more sense and is so much more easier to do with it.
Sure, there are a few games where the precision is not necessary or shooting isn't really the focus but it's just a frustrating experience if shooting becomes important.

Just to be clear, I still kept trying to play such FPS games with controllers and even on phones with gyro and controllers and on TVs also, it's just so much of a frustrating experience that it's not worth it. Just stick to mouse/keyboard and avoid these games if you don't have access to mouse/keyboard at all.
Also, I am aware of aim-assist and even gyro and even touch controls but it's not just a fun experience.

Yup, as it says, moving from keyboard for racing to a gamepad will take some time but having those analog triggers and analog sticks to adjust how much you want to accelrate and how much you want to turn makes all the difference. And if your controller supports good vibrations, it's cherry on top.

Games like GTA V, Mafia where you not only drive cars but also shoot a lot, best work with a hybrid setup. Use mouse/keyboard for FPS sections and Game Controller

If the game shows up with a cursor and has management like Age of Empires, Hospital Management games and so much other games where clicking different part of the screens quickly becomes important, you need to play them on PC.