Hi , I'm so sorry to hear the journey you've had to date. I completely get the frustration of being so close to ticking off the boxes of the criteria, but just not yet getting there. Except in your case, it sounds like you got there 100% and still not diagnosed.
From looking into MS online I have seen others say it can take many years to get a diagnosis, but this is little comfort for those of us who have to go through all the symptoms without treatment (or diagnosis for better treatment avenues).
My experience has been that I satisfied dissemination in space on my first MRI (I have about 20 lesions) - so half of that criteria you mentioned. I had symptoms for 4 years prior to the neurologist doing an MRI (at my request) cos I knew my symptoms could not be in my head (though I'm sure many doctors I saw probably thought they were - I'm sure we've all experienced that in some way!). The second MRI, only 4 months later, said no changes to the lesions or no new ones. My doctor said I just need one more lesion for possible diagnosis, so I imagine I'll have to keep waiting for a diagnosis too. I am currently experiencing tremors, dysphagia, lower limb weakness. I was thinking of seeing an MS specialised Neurologist (i.e. a neurologist with MS sub-speciality training), so not sure if that helps you. Where I live there are not many Neurologists with the specific MS training so I'm trying to think of everything.
I havent been on the journey as long as you though, so I can only imagine how hard it has been for you.