As per our long standing policy of not permitting medical advice on the forum - all threads concerning the Coronavirus will be locked.
For more info on the coronavirus please see the link below:
I can get a decent shave with many of these and have a little love for Derby but the all time worst is Treet. I still have a few and should try them to see if they are still awful and if they are not just rust packets at this point.
Derby Extra, Shark Super Chrome, Dorco ST-301, Gillette Goal Stainless, Bic Astor Stainless and every Chinese blade that I've come across.
While most of these blades aren't beyond terrible and it's possible to get at least a DFS at best, the process is rather painful (especialy if I haven't shaved in a while or if my prep is rushed) and using any of these blades more than twice ( in most cases more than once) is a pure form of masochism.