I bought some Sketchers trainers last year (serves me right I guess) had some plantar faciitis and was hoping they'd help. The quality was absolutely shocking, the covering on the heel just fell away after a few wears like it was made of cheap binbag material.I feel your pain
I have size 14 feet (no, it’s tiny) so the only consistent place for trainers is Sports Direct. Anything but Nike/Adidas and I might as well not bother as I wade through them in a couple of months.
I don’t want to spend £80 on Air Max or the likes but everything else cheaper is absolute guff sadly.