Incredibly rude management.
Work/Life balance appalling. Was called whilst at school and asked to do a shift. Told them that I was currently in school, in a lesson and trying to get an education (even though I had asked them many times not to call during school hours.) Was rudely reprimanded over the phone that I needed to get my priorities straight (and when I say rudely, I mean shouting over the phone in front of customers to me and other staff witnessed and were very disappointed).
Very rude and inefficient management style - only after a handful of shifts there when I started, it was bought to my attention that management were continually talking behind my back, complaining that I was not fast enough because I hadn't learned the shop layout yet. Most of my shifts up until then had been on the checkouts and I hadn't time to know the shop inside and out after less than a week of working there.
Made to feel uncomfortable by inappropriate and rude ego-trips. During a busy period when I was required on the checkouts, a member of the management team who did not get on well with other staff continually called me away from the checkouts, and I was instantly called back (when I say continually, I mean over and over again in 10 minutes, over the tanoy for all customers to hear.) This then led to me standing between a full-scale argument on the shop floor between a manager and another team member in front of customers to my embarrassment. I was 16 at the time.
No employee respect. There was no respect for how hard the employees worked, and the management were just downright rude.