I play a control deck I don't mind at all if my opponent quits. I think most control players are the same. If you are playing a deck that is frustrating you and you are going to lose then just concede. You should only play through those games if you are hoping they make a mistake or you want to better understand how to work around frustrating strategies.

Magic should be fun, but it's also paper rock scissors in the sense that deck a may beat b; and b may beat c but c beats a. If you are mismatched just move on if you aren't having fun. Just get into another match. If you are only having unfun matches, you may want to play a different deck or adjust yours in a way to better handle your bad match ups. Doing this though might make your deck weaker against decks it's usually strong against.