I worked at screwfix for over 4 years, starting as a service assistant from school, and progressing to a Supervisor before moving elsewhere.
There is a brutal bully culture between higher management extending its way down work force. Between all the unessecerry KPIs, auditable requirements and mountain of health and safety, as a manager in this place the pressure is unbelievable considering the peanuts they have you working for.
Service assistants are given false promises about extra hours and progression they are unlikely to see in the timescale that was promised to them.
Supervisors are essentially underpaid managers, having nearly identical responsibilities, but given half the training and resources and left to get on with it.
Being my first role, I didn't know how bad I had it until I moved into a different business. The culture is shocking, the treatment is shocking, the hours are shocking and the expectations are shocking.
Avoid like the plague.
Made some lifelong friends in my time there.
Stress coming from the top of the chain working its way down.