Initially my first reaction was going to be yes, but then I actually thought about it. I only ever had two landlords, three if you include Mrs F’s when I was staying with her for a few months, and actually they were all OK.
First landlord was a builder. House was a bit crap, but he built us an extra shower, and a barbecue which we never used. He let me off a month’s rent when I pretended I’d moved out and gave me a really nice reference.
Second landlord I only saw when he fell out with the letting agent and they tried to pretend that I couldn’t stay there any more. Fairly shit with the perennially leaking roof, but then that was a communal block thing.
Third landlord no problems at all.
All three full deposits back (although on the second one I just didn’t pay my final month’s rent).
In summary, landlords = GBOL and anyone who has a problem with theirs is doing it wrong, or confusing their landlord with a cunty letting agent.