That's the problem with SaaS - they take your data, silo it up, and expose through highly limited and tightly controlled APIs. Sure, I can make IFTTT save a copy of every picture I upload to Facebook into my Dropbox account (or at least I could, I think it broke). But I can't make it save that picture in original size, because someone didn't expose some option, or an endpoint. Or I can't make IFTTT save all the reactions to my post into a CSV in the format: <<datetime, which post, who, what reaction>>, because such endpoints again aren't exposed or integrated. Etc.
I get that IFTTT & folks are doing the best they can, but the companies they're trying to "mush together" made their money on preventing interoperability, so it's still very far from both what could be and what used to be possible.
Though on the other hand if you leverage some other automation tools you can avoid figuring out how to auth to various systems yourself. You just end up contributing to the "everything is connected by duct tape" nature of modern software