As a person who suffered with bad sinuses for most of my life I feel your pain.
Here’s a couple of things I wish I’d learned much earlier in the process.
If you find a neti pot unwieldy, I highly recommend aerosol saline spray, (available at any pharmacy.) It was recommended to me by my surgeon following sinus surgery and I found it to be easy to use and very effective. You must sterilize the nozzle after each use, to avoid reinfection. I use a small bottle of rubbing alcohol, as a dip, and a tissue, after each use.
It keeps the membranes moist, the salt fights the infection, it thins the mucus and your sinuses will drain. Use it often, a few times an hour, until drainage improves.
The same Dr. suggested, when my sinuses were congested, 1/2 ounce of Apple Cider Vinegar, (available at any grocery store), twice a day. You can mix it with maple syrup or chocolate sauce, ketchup, anything you think will cut the taste, if you like. I find it no harder than taking a shooter myself. Be sure to brush your teeth afterward as it’s not great for the enamel of your teeth.
There is an enzyme in the skin of apples, concentrated in the apple cider vinegar, (as it’s fermented with the skins on), that actually thins mucus. Be prepared as this will clear your sinuses in just a couple of minutes.
These two things together are the bomb. Keeping the mucus thin, and the sinuses soppy moist, makes drainage, and relief, a snap. I credit this with finally clearing my sinusitis, notoriously difficult to completely throw off, by the surgeon’s own admission.