After the shots (2x moderna, 1x pfizer) I was quite f'ed up for a long time. It took maybe a year until my physical endurance started coming back towards normal, my sweat was no longer smelling like after a bad flu.

The one or two Covid infections I had after that also weren't great.

I can totally believe that if you aren't a super healthy person that Covid can cause long termish problems in some that take a long time to fix.

There are doctors who have all those patients, and I don't think they spend all day just making it up.