Installed the cbe I think the clamp slipped and the muffler twisted a little I tighten the clamp but can’t get the muffler even like the passenger side should I just leave it ? This was a pain to install three of the cat bolts where gone had to drill out not easy I just so done with it

 

I say leave it .if it's not rubbing or hitting anything it should be fine . I would rather take it to a muffler shop rather than to do it myself, like you said it's a pita.