1) wine is quite good these days. It has played far more than Source Engine games for like 5+ years. Ever since steam went to Linux and the Unity engine became popular, compatibility problems became much less common even on new games.

2) If you are always going to rank playing games as more important than spyware, then you're an easy mark. If you aren't willing to make a few sacrifices to invest in your future, then you're made your decision. Why do you care about spyware if games are more important?

The costs of leaving are only going to get worse with time. I recommend paying these costs now instead of waiting for the problem to get worse.