Did your bow once shoot well and something changed?
Is one shot good and others bad?
Post the specifics of everything in your setup and we'll see if at least from a gear stand point....your squared away.
There can be so many things that go into why your shooting bad. Bow, form, anchor point, arrows..bad or wrong spine, maybe your pulling too much weight, etc..
This even extends beyond you or your bow. It could be the pro shop that you went to. I have seen some of THE most horrendous work done by people in pro shops that it's just pathetic.