Have you considered that some of these symptoms are consequences of locking down society and preventing real human interaction for 18 months? I haven’t had COVID and I have had more depression and exhaustion in the last year than in my entire life.
Was there any place on the planet that had 18 months of uninterrupted lockdowns, preventing real human interaction? The pandemic has hit in waves, and lockdowns were usually only applied when needed.
I think the uncertainty made it worse. Uncertainty is a common trigger for depression and malaise.