Allergies and/or Deviated septum may be the problem. See a good ENT and Allergy doctor.
Reverse squeeze is not what you want to happen. Not being able to equalize and go down is a bummer. Not being able to equalize and surface is a real problem!
This could be a serious problem. If you are constantly congested, the argument could be made that you are prone to sinus infections. Sinus infections can be serious. In extream cases we are talking about loosing your sight (a friend of mine lost sight in one eye to a sinus infection) or the infection could spread into the bone, and brain (another friend has a nasty scar from where his sinus infection spread into his skull and was just about to eat through into his brain.).
I am not a doctor or other expert, just relating the experience of two people I know.
See a good allergiset and/or ENT and treat the cause, not the symptom.