[jp10558]

I think you need to define "better". If you're not set on having the same amount of people (because network effects are the biggest pain, and if it was as big as reddit presumably you'd have heard of it)

TV/Movies has forums at dslreports.org, and people sort of discuss on mastadon.

Technology as Ars Technica, here, mastadon instances and hashtags, discord, and if you're talking work, stuff on mailing lists via google and others, and maybe teams?

I have mostly given up on politics - I can't imagine having useful discussions in public online anywhere anymore.

Home DYI had the HOYUZZ (??) forums I think. But again, that's mostly web based I think.

I'm not into the other stuff so IDK on those. I could imagine someone trying to build a competitor - I mean there is lemmy I think.