Reddit is also reliant on third party apps to get content and interaction since their own frontend and backend are terrible for everything but link and comment aggregation.
It's also slow, very slow.
It speaks volumes that the best way to browse their social media platform is through third party tools or the deprecated interface. Not only is it a superior way to create and engage with communities (the only good subs are the comment/text driven ones these days anyways, if I want stupid videos I'll go to TikTok and Instagram where all that content comes from anyway), it's more performant.
I don't know what's going on at Reddit HQ but I guess there's a reason I've never heard anyone brag about working there.