As you can see,, your last post got edited by a moderator. For language. We are a family friendly Forum here,, so please try & respect that.
As for a gunsmith messing up. I see it a lot. Just because a person calls themselves a gunsmith,, doesn't mean that they are actually a GOOD gunsmith. With the tens of thousands of different guns out there,, nobody can be an expert in all of them. With the modern stuff, many will just be swapping parts, and not shooting more than a few test rounds.
Again,, the best idea is to try swapping out one part at a time to try & narrow down the problem. OR,, return all the OEM parts,, run the gun, then try adding one part at a time.