Arqade is all about collaborative editing and peer-review, as badp has covered. We're all people just like you who came here with a question or two, and we stuck around to help make the internet a better place by providing wiki-style Q&A.
We edit posts to make them clearer and to remove swearing or bad formatting (such as over-capitalisation as you mention) so that they look nice when other people see them.
That's all. There's no malice here, no 'bashing' - and if there actually was hate speech, bullying or otherwise pointed attacks against a user or group, you just have to flag the post and walk away. Behaviour such as that is not tolerated and dealt with harshly should it occur.
Look, I think you're overreacting a little after the shock of having your posts edited for the first time, it happens. If you haven't left already and actually read this after that initial shock reaction has passed, I suggest you take a quick look at our Tour page, as it explains what we're about, why and when we edit posts, and a bunch of other useful info.
In any case, I sincerely wish you the best of luck with your future endeavors, and hope you have a Happy New Year :-)