No, I don’t think they have.
For fans: they fox movies may have sucked to them but I don’t think it hurt their impression of xmen. These people just didn’t enjoy the movies.
For the casual viewer/market: what has hurt the brand recognition is that the movie rights being at fox have Disney less incentive to make toys, tv shows, games, etc. this greatly reduced exposure and brand recognition I think. So no the movies didn’t directly cause this.
I truly believe xmen will bounce back to mainstream prominence once they start appearing in mcu films and tv shows. We are already getting toys and games again.