It won't let me look at it again, but the gist is that all the fast fashion had made it's way into the thrift shops- so it's hard to find the nicer pieces.
It's a big issue in the shops here, most of the things are outlet mall stuff, especially cause some of the shops will only take things within 2-3 years old. I've done ok the last 2 years cause I'm only looking at the more timeless pieces, particularly in neutrals. I barely even try on anything anymore, maybe 2 or 3 pieces, in any type of shop- when I used to take 10+ in to the fitting room.
Online thrifting, excepting a couple things from Etsy, scares me TBH. I buy retail online, but that's cause I can return the things if they don't work.