Very unprofessional HR / hiring - after I was offered a job and they agreed to give me a few days for an answer, they reneged and made me re-interview due to apparently being concerned about me not accepting immediately (not unusual!)
Temporarily changed my routine hours during a busy period, suggested I may get overtime/TOIL for this (if not the many extra hours I worked on top) and then said no - NB the salary was laughable for the reliance on me and the London location (felt quite exploitative)
Manager repeatedly undermined me, blocked opportunities and micromanaged me
Very cliquey