What you referring as 'that' admin in this case is me.
Your first ban wasn't mine though.It seems you have serious problem with cata and ballista users.Do you realize those weapons works 1st come 1st serve logic, don't you ?
In addition, if an admin kicks you in a butt where you stand on ground but not falling from any high grounds, you might be blocking path which players can't move because of you, or you were fighting with your colleges and an admin were trying to stop it. ( if it was me thats what i do, i believe other admins do the same thing )
If you kicked cata user while it was using by admin and take cata control because you wanted use then admin kicked you back because it was his right use it because admin got cata first, then your imply which that admin should get ban doesn't mean anything.
Same goes breaking cata while your comrades are using it.Kicking from cata or breaking cata because you wanted to use or you wanted to troll user.
About your too much reasons to ban players, did you read a big rule banner where you join the server, if you didn't see let me add this for you and check it out where is written by orange colour.