Yes I have a 25+ year old account with 100% feedback, but I don't think it matters nearly as much anymore. Also clearly some subset of buyers understands they can abuse high feedback sellers who want to maintain their feedback rating.

In a way I like the more conversational forum buy & sell system where I have feedback, but also each purchase starts with a DM. I usually can suss out from a few DMs if a buyer is going to be a tire kicker wasting my time, or a perfectionist who will be a pain to sell to. In either case I let those buyers pass and wait for someone worth doing business with.

On eBay you have no choice in who your buyer is.

I set basically everything at an inflated price and accept offers. The kind of person who's going to be a pain will basically never pay an inflated price and if they do you can partial refund the amount you actually would've accepted to let them think they've won.