I have had (just moderate) sinus trouble on and off throughout my life - - nothing as bad as yours, luckily, at least so far.
Moving to a different part of the country essentially eliminates my sinus problems for a few years, though so far it has not been a permanent cure. When I moved from Texas to Louisiana, my sinus trouble was practically eliminated for 4-5 years though I am having trouble with it again.
For me it also really helps to avoid catching colds when possible, and to stay out of crowds of people that might give me a cold or virus. I think my sinus problems are related to mild allergies or sensitivities. Perhaps in my case, my allergic/sensitivity reactions are more easily triggered when I am sick with a cold or virus. At least, when I am sick my sinuses seem to get infected and then I feel miserable for days to weeks. One of the aspects of retirement that I will enjoy is not having to go to work with a bunch of sneezing, coughing, sick people every day.
This year, my moderate hay fever is getting ridiculous and I might eventually have to seek help for it. My sinuses are driving me nuts, too. Everything is in bloom - - EVERYTHING. The pollen is so thick you can see it all over the cars. Not only that, a person who is always sick moved into the next cubicle at work. She never uses sick leave when she is sick. She saves it to use for "fun days", and when she is sick comes in and coughs and sneezes and does her best to spread her germs everywhere. Oh, goodie.