1. For devs/uploaders: Improper tags or non-existent tags. For example, if something is about incest, it should be tagged as such. Even if Patreon rules means it's clumsily hidden, the dialogue usually makes it obvious. Tag that stuff so I don't waste my time and bandwith. That's just the most common example. It happens with all kinds of stuff.
2. People sniping each other over preferences. If it ain't pedophilia, let it go. I find lots of stuff gross, unfathomable, distasteful, etc...put I don't need to piss in someone elses wheaties. There's a little degenerate in all of us.
3. Devs: bait and switch. You know what I mean.
4. Subtle and not-so-subtle racism in the community. Unfortunately, some of this is unavoidable. If someone fetishizes "BBC" or cuckolding, the characters in the game are going to look and act a certain way. Younger people are going to consume that common material and get ideas. I'd certainly love to see more Liams and less unrealistic DaQuans. Of course, some of the developers and users are pretty provincial and get ideas from the old tropes, so what are ya gonna do?
5. Crying about breast sizes, penis sizes, etc. For tits, well...you see what you're getting into as soon as you go to the page. Move on. For dicks...we've all seen bigger in porn and TBH if 6 is average, anything less than 9 is probably pretty common. Also, most growth down there is complete in the early teens IRL. So yeah, a scrawny adolescent can be packing. Again, move on.
6. Finally, for devs: BS build numbers have got to stop. A 1.0 should be a a rough smooth at worst. Maybe some bugs or rough edges to sand off, but complete in most ways that matter. That also means a 0.8 or 0.9 should be "almost done" builds. Not a quarter of the way. Not half way. Of course, the way AAA's get shat out unfinished nowadays I shouldn't be surprised.