I've had plenty of trouble holding hate off monsters in a speedrun.

Flash is our ONLY viable AoE for hate. Dont kid yourself that the laughable 100 potency attack (with no enmity modifiers on it) from Circle of Scorn will even remotely contribute to the hate you gather. In comparison, it gives you the same amount of enmity as a DPS gets from doing just one basic attack.

I hate speedrunning things on PLD. Monsters go all over, and if the fight lasts longer then my MP, people will start to get hurt.

This isnt a point of "learn to tank" or "you must be doing it wrong". Paladin simply arent made to hold large crowds of monsters for an extended period of time. If stuff isnt dead by the time 30 seconds have passed, you're out of MP and out of ways to get hate.

Flash doesnt give that much Enmity either. If a DPS focuses on one monster, you cannot hold hate with Flash alone. The only way how Speed Running is viable on PLD is if you have two AoE-only DPS who dont unload on one specific monster but keep weaker attacks spread out across a lot of monsters. If you end up with a DPS that can only do single target attacks, it's over.

It's a terribly flawd system and can only be fixed by either;

A: Making people stop doing Speedruns or large pulls (yeah, good luck with that...)

or

B: Buffing PLD just like how Warrior got massive buffs and giving it more AoE attacks that it can spam for hate, possibly modifying Circle of Scorn to have a lower recast and more enmity generated on it.