Yuck. This is an issue with opinion-based services (with little chance of bad or dark gray opinions getting caught). Same with a tax preparer helping get withholding to the liability amount, say to make their net meet expenses every month, and then getting fired for not getting a "fat" refund.
I have been fired so many times I have lost count! I still, to this day, get into it with CPA types who do incorrectly tell my customers something. The most common examples are owner/shareholder who are also employees. CPA or other "expert" says to pay themselves wages once a quarter/year (the expert later cleans up all the "draws"), or report >2% S Corp health insurance once a year. The former do get caught "tax shifting" from time to time, the latter never get caught because it is a tax wash, but still improper.
I remember doing the math for ERC to present it, and some would look at me sideways when I pointed out the ERC $ was not what the net would be. Funny, I am still ticked at the after the fact claw back of the last ERC quarter to help fund the recovery act money. Catch-22, some of the money went to rehab two race tracks I like to watch, those tracks are not going to give me a discount to cover the ERC I lost to help pay for their "gift". I thought I would personally get at least some via recovery act credits for solar and electrical upgrades, but CA has made solar a non-starter for me, given my age, roof size, and ability to shift loads to off peak.