there is a way to edit ur posts and answers

I get the Quote option but not Edit this post

Oh, actually the option was available for this last reply but I still cannot edit the original post.

You can find "Edit this question" under the "Question Tools" menu in the sidebar. For a reply, "Edit this post" is in the three-dot menu next to a reply.

You click the three dots to the right of your user name to edit and if that's your post you can edit it-

That is for replies in the thread and not the OP.