Why are the Philadelphia Eagles and their fans so hated?

Whether it’s on here, YouTube or other social media, I see a lot of dislike/hate towards the Eagles and their fans, so why is it that they’re so unpopular with everyone else?

I’ve also heard quite a few people say the phrase “Philly fans are arseholes” is this is a common saying amongst other NFL fans or is that just how people feel about them in general?

Even seen a few say they’re just as hated, if not more than the Cowboys!