Bulls, Blackhawks and WhiteSox fans aren't bad at all.
Bears fans are among the worst in sports. Cubs fans are just unique with lots of good and bad.
I'm talking about Chicago born and raised fans, Bears fans in Iowa tend to be normal fans. I grew up cheering for the Cubs and Bulls but never had an NFL or NHL team. During the 15 years I lived in Chicago I was 100% repulsed by Bears fan and Bears media (there is no sports media, there is only Bears media). White Sox fans are identical twins with ISU fans.
There aren't a ton of Bulls fans per capita in Chicago but the fans they have are solid fans. There are a lot of non sports fans and tourists who go to Bulls games for something to do or to see the Jordan statue.