When I married my wife and she moved in we tried renting out her house with a property management company. She got one tenant and had that tenant for over 2 years with no complaints and we never raised the rent, just enough to cover taxes going up too.
But when we wanted to move to a larger house we gave her an 8 month notice we couldn't renew since the market is so bad and we needed to sell. And my wife wasn't profiting at all, she was still in the red from the repairs and setting up the house to rent out. We offered her like $10k off the price.
Anyway long story short, the tenant gave us hell for those 8 months, and when she moved out we found she never complained about anything because she ignored all the problems which made things worse and the house needed thousands of more dollars to prepare and sell.
She'll never try being a landlord again, she hated it and the tenant shit talked her "landlord" on Facebook all the time like she was some evil monster.
I don't know how anyone else does the landlord thing, this must be all the ones run by evil corporations.
This was a house my wife bought for like $150-180k originally.