I honestly have nothing polite to say about any mechanic I've dealt with over the years, but that might be because I'm female.
A couple examples - I had new plugs & wires put in before winter (I can't reach banks 1, 2 & 3) and on the work order when I went to pay there was this very cryptic message about the IMRC linkage and that it would need to be repaired soon or I would start getting check engine problems, with a quote of more than $2500 for the repair.
I got home, popped the hood, looked around the IMRC and spotted the problem - the plastic clips that connect the arms to the IMRC were broken & perfectly fell below... they were still clean & white so draw your own conclusions.
For $9 I bought a pack of 6 new clips (only needed 2) and fixed the problem in about 15 minutes... $2500 my arse
Example 2 - Needed to replace one of the PCV elbows as it was starting to wear; went to the parts counter and after having to argue that I needed an elbow not a valve I was told that if it's not in their computer as a part to order (it wasn't) then my vehicle doesn't have or need it......
I have boobs, but I'm not an idiot.