I can't articulate my feelings, thoughts, opinions well and it makes me look like I'm stupid

Title. This happens all the time whenever I say something, anything and people always have to pick it apart or pick me apart or insult me. It's only a few hours or a day or even a week or a month or a year later that I think of a better way of saying things or a comeback. It feels so alienating whenever someone talks down to you or makes you sound ignorant or stupid. Literally everyone does this to me. I barely do this to anyone else. Why doesn't anyone give me the same leeway I do to everyone else???