Here is a bit from another article about shitty fan bases. This one is from a couple of years ago.
1. New England Patriots
You did it. You really did it. Never before in the history of sports fair-weather fandom has there been a group as obnoxious as the Pats' fans. I’d like to rewind to the year 1993, when everyone was convinced the Pats would move to St. Louis and become the Stallions, and most Boston people COULDN’T CARE LESS. The Patriots were, for so very long, the bottom of the barrel in terms of local fan enthusiasm. The Red Sox, Celtics, Bruins, and all of the major college hockey teams in the Boston area all enjoyed more support than the Patriots. And then of course we know what happened. It became the year 2000 and Andover and Wesleyan graduate Billy Belichick started coaching, Drew Bledsoe got hurt, handsome Tom Brady stepped in, and the hapless Patriots started winning Super Bowls. And suddenly the fans came out of the Walden Pond woodwork.
https://www.thrillist.com/entertain...in-the-nfl-patriots-raiders-seahawks-and-jets