Regarding Nia being a liability to others in the ring...
Somebody booked her in these matches and it wasn't her. If she's being put in there while still a KNOWN liability (which I'm personally not convinced she is at this point) the fault lies with whoever booked her in the match, not Nia herself. You don't hire a surgeon with a motor function issue, for example and have them in there doing surgery on people.
All that said, Nia Jax is probably my least favorite rassler in the big 2, and she beat Bayley so she can stick it, brother and so can the person who booked that.