Big Man Penalized by REFS?????

[OHBBREF]

I don't see a crying face to insert here.

Physical play is a point of emphasis and has been for years, so if your big man being physical it is going to be called, and if they are pushing yor big man around it should be called, however coach, there is something called advantage/disadvantage, their big men probably aren't really pushing your guy around enough to make a difference and your guy is.
Teach him footwork and balance and all of the skills that he will need to advance the next level they can teach him how to be more physical at that level.