Let's face it, anime fandom can be annoying as hell. Sure, the physical and online spaces where fans interact are great places to make friends, but there are some truly unpleasant things that can happen when enthusiasts start talking anime.
Despite the amount of morally positive series that exist, there's a shocking amount of toxic behavior in the anime fandom. Whether it's shipping wars, cosplay shaming, verbally eviscerating people who prefer dubbed anime, or just straight-up bigotry, there are a lot of problems that anime fans could do a better job of addressing. All anime fans have a shared passion, so there's no reason to be rude to one another.
Weeaboos are one of the most irritating aspects of Western anime fandom. A weeaboo is a fan who isn't Japanese, but who has decided that liking anime gives them free reign to appropriate Japanese culture. Weeaboos wear kimonos incorrectly, give themselves Japanese nicknames, and see Japan as some kind of idealized holy land for nerds. If they like you, you're "sugoi!" but if you anger them, they'll "korosu" you with the fake katana that they bought at an anime convention.
These fans treat Japanese people like extensions of the media that they love, and don't recognize that Japanese culture amounts to a lot more than cool cartoons. Whether it's adult men salivating over Asian teenagers, or someone insisting that they know everything there is to know about Japan because they watched Naruto, these fans relish in Japanese stereotypes, and don't really care about the people of Japan and their culture.
Cosplay is a fantastic way to creatively express your love for anime, but the fun stops when people start cosplay shaming. Cosplay shaming involves insulting a cosplayer either for how their outfit looks, or how they look in it; in either case, its unkind and inappropriate.
There are a lot of reasons why a a cosplay outfit might not look identical to its animated counterpart. The cosplayer might have run into budget or time constraints, or they might be a beginner who isn't totally comfortable putting a costume together. Whatever their reasoning, they're just trying to have a good time, and they didn't dress up to gain your approval.
The worst examples of cosplay shaming are comments like "you're too fat to cosplay her, she's skinny" or "your skin is too dark to be that character." The cosplay community is supposed to be fun and inclusive, not a place for bigotry.
Imagine you're talking to a self-proclaimed anime fan, who really just got into anime. Other than a few random episodes of Pokémon back in the day, they've only really seen Sword Art Online, part of Naruto, and the first season of Attack on Titan. Is this person a "real" anime fan?
If you answered no, then you should know that a lot of fans find your attitude annoying. There's no test that you have to pass to be a real anime fan, you just have to enjoy anime. While it's great to familiarize yourself with a variety of anime — including classics and more obscure titles — you don't actually have to do anything specific to participate in the community. Your level of knowledge doesn't correlate to your enjoyment of the medium.
For complex neurological reasons, humans naturally love media that they were attached to during their teenage years. This means that there are a lot of adults in the anime fandom whose favorite shows came out in the '90s or 2000s.
While that's not inherently a problem, issues arise when fans insinuate that every anime made after their personal cut-off point is trash. These people usually forget about the plethora of not so good anime shows from years past, since they can only recall memories of their favorite series. Good storytelling has always and will always exist, and anime studios are perpetually expanding the tools that they use to tell those stories; people who reject modern anime are missing out on some seriously good content.
This attitude usually comes off as condescending to younger fans, who are actively making the memories that older generations reminisce about. Trash-talking new anime definitely doesn't encourage junior fans to check out the archives of anime history.