There are two types of annoying fan bases, and while they can be equally terrible, their terribleness stems from different roots.
One is the fair-weather type. The types of fans who support their local team when it's going well, but still feel a need to show up to the arena in a LeBron jersey when the Lakers come to town. One of my go-to comments for them is that the jersey reversible, and it says 'Curry 30' on the other side. They're typically the ones who make the lifelong fans look bad. Examples of these teams are the Lakers, Knicks, Warriors (10's), Heat, and Bulls (90's).
The other is the soccer-mom type. They're often lifelong supporters of their team, but they're overly invested because it's the only show in town. They react to everything in extremes because it's always life or death as a sports fan with only one big local team. There isn't another club to boast about to make up for the shortcomings of another. While I find most of these fans less annoying than the previous, they're often too irrational to debate with. Examples of these are the Blazers, Jazz, Thunder, and Kings (00's).
The Suns kind of fall in between those two groups. Phoenix was originally a basketball town populated by people from somewhere else, but now it has all four major sports and several other events like golf tournaments. The lifers can be irrational (checks self post history), and the fair-weather fans will source their Suns fandom from some Booker-Kobe lineage, thus enabling them to still wear a Lakers jersey to a Suns home game. It'll always be a mixed bag in Phoenix.
This isn't to say there aren't exceptions to the two category rule. Take Boston and Philly, for example. Fan bases from those cities have a reputation for being assholes in general, but at least it feels organic with them and therefore doesn't annoy me as much.
UOducks4life in a previous life. Valar Morghulis.