Nasal Congestion - Nothing Works - Steroid Sprays, Antihistamines, Saline, Capsaicin Prays

My problem started about 6 years ago. I don't remember triggering it, but my nose got fully blocked, I couldn't breath through my nose at all. I went to see an ENT specialist, done the allergy test. He said that I was allergic to dust mites, and that I needed a surgery to trim my middle turbinates so the nasal spray could get through. 

After the surgery my nose was fine for fine, but it was very short lived. After a few weeks it was just as bad as before. 

I tried different nasal steroid sprays, antihistamines, saline, capsaicin prays, acupuncture, and noting, not the slightest improvement.

My ENT said that the hot humid weather was the problem and if I moved to a cooler climate it would get better. So I did, and indeed it got better. I no longer live there, moved about a year ago, but still having nasal congestions. At night times one side is always congested, during the day it's better, but sometimes it can get really bad, no idea from what. Maybe the change in the weather, pressure. 

I also noticed, that if I bend forward my nose immediately starts to get blocked.

I also read that it could be a nerve damage in the nose, and that the blood vessels lose the ability to constrict.

I think doctors looking that problem from the wrong way. Trying to reduce the inflammation in the nose without knowing what causing it. It's like if you had a swollen gum from a bad tooth, and they would only treat the inflammation. There wouldn't be any point to do that without treating the tooth itself, which causing the problem at the first place right?

So I assume that's the case with this awful sinus congestion, cause unknown therefore most treatments  fail.

I'm very suspicious from ENTs, I heard many horror stories where surgery not only didn't help but made things much worse! 

I'm wondering if anyone had or having similar problems and how you managing it.