I don’t actively quit on games often at all. I’m far more likely to get bored and just stop playing them, or jump on something new before finishing what I’ve already got. But I very rarely give up on a game on purpose.
I’m probably not going to finish Resistance: Fall of Man. I got it because it was cheap and I’ve heard a lot of good things about Resistance 3 and I wanted to start the series from the beginning. But Resistance was a PS3 launch title, over six years old, and it has aged poorly. It’s a fairly good looking game, but it seriously lacks color and the gameplay is very bland. Then it has a problem with checkpoints being too far apart, and where I am in the game is getting fairly difficult. So now it’s not exciting, and it’s not fun.
So instead of forcing myself to play something I’m not enjoying over and over until I get through it, I’m giving up. I read the plot synopsis on Wikipedia, and I’ve started Resistance 2, which is a better game so far. I’ve got way too many other games to play to suffer through something I’m not enjoying.