Perhaps that kind of paranoia is part of what's wearing you out?
Yes, there are incognito freepers, and maybe even a few paid political hacks now and then, who come here and stir up trouble, but if you're starting to imagine them everywhere, any time anyone disagrees with you, you're letting this place drive you crazy.
I am sick of arguing about politics. I've gained noting, convinced no one that my position is better...
People seldom every change their minds about anything right before your eyes, unless it's a pretty minor point about which a person feels little conviction. How often do you ever hear anyone anywhere say, in response to a particularly well-fashioned argument made by anyone, "You know. You're right and I was wrong. I've changed my mind."?
The most any of us ever usually manage is to plant the seeds for future thought, ideas that might later influence a person when they are quietly thinking to themselves, after enough cumulative influences begin to reshape their opinions.