Did you start with the basics 1st?

Meaning, have you done the sub crawl to ensure the EP is in the best place? Even if you can't leave it in that place, try it for a demo to ensure there is nothing else going on.

Also, try 80 Hz crossover instead of 100Hz.

I'm far from an expert, but I would make sure the big things are done before starting play with trim settings, phase, EQ etc...

I hope that's a starting point for you anyway.

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1