Qwiss he's definitely mediocre. Arteta keeps buying left backs because of it. He was never going to be a real option at left 8 for because he's not good enough there. That only works for Ukraine because international football is a lower standard. He's an Everton level player, to Arsenal that is mediocre.
On the one hand, sure , but my point is our bench players mostly get labelled "mediocre" over time, and we complain about them being hard to shift because they're little used.
If you squint you could imagine complaints about Merino and Calafiori being brittle, mediocre, highly paid surplus in a couple of seasons etc etc. Because if they're not starting, then that's the squad status Zinchenko has had to end up where he is.