When should I seriously look at switching attorneys?

Background: Me (M47) and my ex (F45) were divorced in 2017. We have 3 children (M18, M17, F12).

My attorney was excellent during the major portions of the spit, negotiations, etc. My ex is very difficult to deal with so it was especially important to have a competent, aggressive attorney on my side. She got me 50/50 custody and my ex pays child support.

Now that we're a few years don't the road, there are a few lingering issues that seem to be stalled out. My ex is intentionally stalling and my attorney hasn't been responsive (ex. Email replies taking a week or more, not fully reading emails, slow in pursuing things).

Currently, I'm waiting to hear on 2 months of delinquent child support, child support true up from 2023 , and division of retirement accounts.

I guess the con is the expense of having a new attorney review the case files and being unfamiliar with the case.

Thanks