The term Mid Bass is getting thrown around here without any definition.

0 - 80Hz: Lower-bass / subbass range
80 - 150Hz: Mid-bass
150 - 250Hz Upper-bass

if we are using this as the standard, then why are you criticizing a sub, when you can just as easily be pointing the finger at the mains? The 150Hz down to 80Hz sounds like something that your front speakers should be performing.

What are you using for your left and right front speakers? Or is your definition of mid mass something else.

Anthem: AVM60, Fosi DAC-Q5
Axiom: ADA1500, LFR1100 Actiive, QS8, EP500, M3, M3comp, M5