I worked for a congressional campaign in 2022 and our internal polling was so wildly off in the primary/general it was comical. This was done by a fairly high profile dem pollster who does other competitive races.

They didn’t really have an explanation for the miss but the fundamentals of the race were far more in our favor than the polling suggested (I was far more bullish at the time and we ended up winning by 9, not the 1-4 points the polls suggested)