Finisterre repeat old favourites, as do (to some extent but not as a rule ),Toast.
Many outdoor brands, including Fjallraven & Patagonia do too.
I am expecting another colossal drop in quality across the high street due to the cost of living crisis: I suspect that with each recession brands begin to cut corners and source cheaper materials/manufacturing in an effort to give the illusion they haven't been hit by inflation. This also happens with food.
I spotted a raggy old Dorothy Perkins jumper in a charity shop yesterday for £14. You can buy cheaper in New Look, Matalan, Tesco, etc. I don't think this is because these stores are doing us a favour, it's because they are reducing the quality and cost of materials all the time, so I predict it will get even worse with many more stores going under.
These days I rely on outdoor brands, yoga stuff and lightly used items via Ebay. I found an unused tweed wool coat (formerly Brora) for £40 when it would have been over £300 new. Also find a good deal of hand knitted stuff on Ebay, too, although I have never tried Vinted.
And no, before anyone suggests it, not all of us have time or patience to learn to knit, and some of us are naturally very crap at it! It is similar to telling someone to paint their own landscape because they'd love an original Turner.