Well, of those, LH pretty much packed its bags and moved to /trash/ because basically anything remotely lewd or even facetious was getting people banned. I mean its one thing for edgy shit like Lily abuse or whatever the fuck, but when you start banning people for Leni or Luna (who are older than most of the Star vs characters) it gets a little ridiculous.
SU I've always avoided because the fanbase is carcinogenic and most of the character designs especially Steven suck shit. From what I understand though they occasionally get forced onto /trash/ whenever its a long hiatus.
GF had a similar situation during its long hiatuses once or twice, but its definitely out of the crosshairs, especially when compared to SvTFOE and TLH.
It's honestly just because the mod that was put in charge here (Redwood) is a capeshit teethlet who had a low opinion of the cartoon side of /co/ in the first place yet loved Korra, which is why that pile of shit was allowed to flood the board while it was airing. Dunno if he still is a mod here (last I heard he changed his name to Henchouse) but the janitors he brought up under him all follow his shitty example lockstep.