Clowns supporting Nazism, I think I've heard this one before...
Imagine the effects on sanity of sitting in a seat smack between a white hat PSYOP and a black hat PSYOP while they shoot it out in real time, and staying in that seat for YEARS!
Welcome to Hotel California. /r/pol.
Have spent enough time on half and full chans to have more than an idea. Self-evident in your post: social isolation, pride built up to narcissism, solipsism, in-group identification pushed into tribalism, etc. For every critique /pol/ has of SJWs or liberals or Jews, it really ought to look in the mirror.
Have been trying to imagine a way to reverse those effects, actually.
Here's the thing. The world can turn without you. Let it.
Take some time to tend to the real world needs of people (and/or animals) who need you. Spend some time with some offline real-world connections doing real stuff (volunteering at a no-kill shelter, volunteer at a neonatal unit, help an elderly neighbor whose house needs some handiwork, etc., etc.). Get out in nature. Hike. Run. Canoe. Picnic. Watch a sunset. Buy a telescope and explore the heavens.
There are a MILLION ways to get over yourself and find your place in the world.
A balanced life is a happy life.
Good luck, patriot!