Too many blues

With a crowbar and sledge hammer, if that doesn't work ya cut outer door skin off so ya can get to those pesky push clips.. Jk.

A good trim tool works, you don't wanna scratch anything , get the tool under where they clip onto the panel, then pry..so that you dont put stress on the 50 yr old fiber board panel and ruin it. Dont forget the screw or bolt at the latch handle and window crank alen

have any drawing or picture of the clip locations? Did you pull straight out or something other?