I had it for around 2-3 years too, but in February I got COVID again, and when I got better it wiped like most of the brain sludge. Fast forward to a couple of weeks ago and I got the new fancy Frankenstein version, still have a bad throat, but it wiped out the rest (brain slowness and general tiredness) and I'm more or less feeling like before COVID!

Crazy and anecdotal of course.

Hang in there!