This has been my personal experience too, every other tank I've had besides this one had little to no drama, realistically I don't think I'd keep two tanks if I were to downgrade.Disagree on this last part, i have multiple tanks and kept many sizes over the years and bigger tanks are without a doubt harder. Sure water chemistry etc is more stable but you are still eventually going to get issues like GHA/Dinos/Aiptasia etc and when you do they are 1000% times harder to fix. There is no taking rock out and scrubbing or rip cleaning. Manual removal can take hours in tank only for it to pop back up the next day. It's just so much harder to correct issues. A 100% water change and rip clean on a 50g tank is a few hours, a 100% water change and deep cleaning on a 500g is a few days.
I like the idea someone else threw out, if it's stressing you out turn it into a fowlr and get a smaller tank for reef keeping
I really don't mind downgrading BUT selling my bigger fish just feels wrong to me lol I love my yellow tang, here in Australia it's always been an expensive fish I got him for $170 aud before the ban and he really was a dream fish of mine... I'm just unsure what to do :/