I thought this same problem with PLD while tanking final fights for mnk drg and brd. I was having a hard time controlling the situations so I changed back to gladiator and tanked them all just fine, I felt like GLA could hold hate as well but i also had access to invigorate, second wind, sanguine rite, and featherfoot which made it so much easier to recover, kite, and hold hate in general.

I thought to myself this is just because PLD is new and I dont have enough practice with it, but I see Im not the only one who felt PLD was lackluster.