>>148954387 (OP)I personally don't think so, but not for lack of quality. Ben 10, if I had to hazard a guess, scratches a specific type of autism similarly to how you have autists for shit like Transformers, Mega Man, TTE or even a lot of superhero properties. You have a large, eclectic, and extremely distinguishable, colorful cast of "hero" characters, often with snappy names, as well as a relatively open setting to play with them in, as well as a decently structured central cast, side cast, and usually both singular plotlines and MOTW shenanigans for the central characters to fool around in. To add on, thanks to the initial popularity of Ben 10, there are both multiple long storylines and even multiple iterations of the property, further feeding autism, fan shenanigans, etc. Ben 10 is also more open to shipper shenanigans and chicanery, e.g. Kevin and Gwen having a relationship, Ben being hit on by alien space babes, etc. etc, which is always fertile grounds for autism.
SRMTHFG is a really good show (at least IMO) but it only touches on some and not quite enough of these aspects. The cast is singular, colorful, and has snappy names but it's a much more tight knit show in the sense of cast and especially "herodom" than Ben 10. It's always gonna be Chiro and the Moneky Team, maybe Jinmay, and on occasion a one-episode ally, usually against an array of eclectic MOTWs and adventures, though there is also a singular overarching plot to the show which grows in importance with time. SRMTHFG is also IMO significantly more inventive and weird than Ben 10, it's not exactly more complicated in writing terms or anything as both are children's media but you get a lot more out-there or notably creepy stuff, which lends itself to a different type of fan autism.
TL;DR It's a bit more work to integrate OC shenanigans into SRMTHFG than Ben 10, which isn't a disservice to the show, EEnE is the same way compared to KND, but it also means that fan work is reasonably less common.