Yes, I wouldn't mind going back for a time, as long as I was safe, and there are some eras that particularly fascinate me. Still I think we are better off now, with all our problems.
Hope I would have thought you of all people would appreciate what we have now, despite the problems you mention which are real to all of us. I don't think most of us want longevity over quality of life but with the advances in hygiene and medicine, it's natural that more people live longer which is fine as long as they feel OK and are able to look after themselves.
Speaking of pollution, I still remember smog! Coal fires. Chillblains though I never actually had one of those but plenty did.
It's a lot more than any of that though, the advances in human rights are something to be very pleased about (I realise I've got a 'thing' about that, not without reason). Yet we have far to go, there is so much hardship and poverty in our relatively well off country which the government tries to hide. There will always be something to strive for.