There are two ways you can work around this. The first is multiple subwoofers at least two preferably 4.
Right. But guys looking to tech for solutions are never likely to do the right thing. Just look at all the posts above. Everyone here knows the answer, but nobody even thinking to ask the guy how many subs or what he's doing now. Just knee-jerk yeah spend money! GIK! DSP! Bass trap!
That last one at least, I imagine the Star Wars dude, "Its a trap!"
OP could buy a Swarm and have SOTA bass for less than he wants to spend to make what he has a little less bad. But will anyone even bother to mention that? Besides you and me I mean?