Getting stuck and pushed around is terrible feeling

Simple as what ^ says every mob being able to push you and us not having the ability to roll or move though it in any way makes alot of really terrible encounters and with maps being narrow it happens alot...

add more phasing in the roll would help this

Funny enough, when I played Last Epoch season 2, a mob pushed me, it took me a second to realise that it did not bother me one bit. It was a clean push.

I think the push is done poorly in POE2, it's choppy it's "sticky", it feels almost desynched.
For example if you roll out of queen of filth roll moves, the game will often teleport you back to where she finishes even though you're almost at the other side of the screen. That happened multiple times with no visible lag spikes, at 23ms ping.
I think they may be able to fix it, but it will need to be changed a lot on the technical point.

The phasing you suggest could help in the example I used, as it would remove you from the "grab" that push mechanic seems to have.