There are many, many stories of incompetent dealers littered throughout the corners of the forum. There are also some excellent dealers.
I suggest adding details, where are you (general area is fine), and what dealer have you tried. Chances are, there are others who live near you and have recommendations for a competent dealer in your area.
Personally, I have referred several to the dealer I have been using, after the three other dealers in the area failed miserably on relatively simple things. All of these referrals got quick and professional care from this dealers techs and service writers.
You see, there are some who know a little but claim to know everything, there are some who know nothing but claim they know enough, and there are some who may not know it all, but have the professionalism to dig until they find the answer. Unfortunately, the latter may be the exception in many areas.
A friend just bought a '23 EV LT2 in KS. The dealer clearly admitted, they sell all of their Bolts to CO residents and never see them again. Somehow, they have been successful in getting inventory in this remote, rural KS area and because they are willing to sell at MSRP, have sold a lot. They claim to have trained/certified techs, but probably haven't actually worked on many Bolts, so their book knowledge may meet minimum requirements, but the lack of experience suggests they will struggle as they learn.
How did I know my preferred dealer was worthy or recommending? On the weekend before the battery replacement announcement by GM over the fire recall, I went to talk to a sales guy about the '22 Bolts, wanted to see them in person. He was driving a '19 Bolt and quite knowledgable. He took me into the service bay to meet their top EV tech who was in the middle of module replacement on a Bolt battery pack. Module replacements were done on a sampling of Bolts as GM was trying to figure out the best way to deal with the replacement program. They enlisted the top techs around the region, measured competence, speed, and subsequent problems. Not all were 100% successful apparently, and the time to replace modules was apparently deemed too time consuming. But the fact is, this tech knew his stuff, and proved to me the prior claims the dealer had made about their expertise were real. Several months later, my pack was replaced, it was a flawless experience.
So do some exploring to find the competent dealers in your area.