For me it is throwing a preset on every photo and calling it a "photography style."
It's especially frustrating with wedding photographers because people choose their wedding colors carefully and then the photog comes and desaturates the gorgeous blue they picked out and just says "well that's just my style."
1- "all my photos are the same color" isnt really a photography style to me, and 2. Imo, a good photographer (especially wedding photographer) should be able to capture the environment around them, and that just takes a lot more than slapping a preset over them and adjusting nothing.
Just keep in mind that you see your failed shots, but not theirs.
I shoot sports a lot for work and I also get a lot of bad shots lol.