Expected long hours, way over contracted hours, without overtime paid and wouldn't pay me extra on top of salary for the occasional weekend events we had to do. No pay rise for 4 years at one point.
"Boy's club" culture where the (male) business owner frequently socialised with male employees outside of work. Guess who always got the promotions and favourable treatment? When I made an informal complaint directly to the business owner about this, it was dismissed and I was told I was just imagining things.
Micromanagement. No freedom or permission to actually get on and do the job the way I wanted to, but then told that I lacked initiative when I asked for a pay rise.
David Brent-style manager who used to do stuff like tell me how he wanted something done, then I'd point out the flaws in the plan, he'd double down because he couldn't bear for a younger woman to have a better idea than him, then when it inevitably went wrong as I'd predicted a few weeks down the line he'd be pointing the finger and asking why on earth did I do it that way?? Conveniently could never seem to recall, even when I reminded him, previous conversations where it had been his idea and he'd dismissed my concerns.
Business owner bringing his personal problems to work and verbally attacking junior staff - only ever females - because he was going through a stressful divorce. This included swearing and shouting at one female employee in her early twenties which resulted in her crying in the toilets, feeling humiliated. Shocking to witness.
Final straw for me was when, after years of loyal service (what a mug I was), they only deemed me worthy of basic SMP and didn’t offer any kind of enhanced maternity package. This is whilst the owners are upgrading their cars every fives minutes and showing off their vast wealth (literally coming into the office and saying “check out my new Rolex”). The shit maternity pay was so typical of the way they treated females in the organisation. I finally just realised how little they valued me, that actually they needed me far more than I needed them, and that I needed to get out for my mental health.