But how is that a problem? Disney takes a lot of things that are extremely not kid-friendly and polish them up to be palatable with a G/PG rating. They can't be held responsible when a parent fails to do their duty and research their kids interests.
the thing is, deadpool isn't remotely close to the things disney typically pretties up for kids
the whole point of deadpool is to be super adult and offensive, and new content for him is still being produced
the only thing i can think of that comes close to his level in terms of how 'adult' the originals were is, like, Grimm brothers' fairytales, which are old and rare to see nowadays unless you specifically search for those versions
What did Disney do? They're not allowed to use certain Marvel characters until the deal with FOX runs out.
I specifically remember my cousin watching spider-man cartoons on Disney XD or disney channel that had deadpool in them. Tried looking it up and only got the amazing spider man appearances(which are one possible source), but that wasn't it.