Whats with all the fan base hate for Guilliman and the space smurfs?
They’re the poster boys for 40k’s most popular faction, so they feature a lot in the artwork and background and get upheld as the “standard” others aspire to. Then, society being what it is, people feel the need to denigrate them and try to look edgy, in the same way some teens act to their friends like they don’t love their parents. I’m sure there are also people who are genuinely adverse either to the hidebound nature of the Ultramarines or the at-times questionable actions of Guilliman, but it seems the majority are just jumping on a bandwagon because they want to be cool and defy 40k lore authority. Personally, I don’t find the Ultramarines hugely appealing, but this is still an Ultramar safe space.