That's not strictly true.  I've had quite a few posts deleted over the years, and while some of them might have been bad (probably troll-type posts), some of them I just didn't understand the reason for.  And sometimes you'll get a post deleted if you quote another post that gets deleted.

In any case OP, don't let it bother you.  I haven't checked your post history and don't know if you're a shitposter but if post deletion starts to become a pattern with you, you might want to think about stepping up your constructiveness.  Looks like members here are giving you some feedback which you ought to take to heart.