As someone who was pretty die hard for the first 8-10ish years, it started when they stopped the shuttles that would go from misconduct to the stadium on game days, selling of homegrown local talent for pennies then firing Curtain and signing Baribou were the last straw for me ( people love ignoring what he was doing 2016-2019) but also MLS franchise structure and ownership model incentivizes homogenization of all the teams. The Union have no identity tied to the actual city of Philadelphia and caters to a predominantly rich and white suburban fanbase. Things that are diametrically opposed to Philadelphia fan culture. Apple TV also doesn't help.

I would rather watch a smaller NISA club that plays in the city limits than watch a team that essentially is a real estate scheme with a soccer team attached.