well, first in rules the cade. they hold no obligation to let you in. so in that way, it is true that you ere in the wrong for shooting the couch. sinister obviously still hsn't learned to kick first though, if he's jumping to bans.
now, calling someone a bad admin is not disrespect, as long as you do not continuously go on about it. if you sit there arguing with them constantly calling them a bad admin, then yes it turns into disrespect.