I live in two places in Germany: a city of one million people and a small town of 16,000.
In the city the apartment I live in as well as most buildings nearby are owned by a stock company that owns 42,000 apartments and is mostly (88%) owned by the city.
In the town the apartment is part of a building owned by an elderly couple living a few blocks away.
Compared with the company, dealing with the private landlord is a hassle. He's not very mobile, so every interaction basically takes place in his living room. He's also of course not doing this full-time, so he's not always up to date on all legal aspects or all of the necessary paperwork.
It's nice to see private individuals owning land and houses in principle, but from a pragmatic point of view the company is far easier to deal with. Their scale allows them to have offices with actual business hours and problems can be handled as routine whereas with an individual every little thing is of course special.
Because the company is mostly owned by the city, they also invest in long-term projects and community building -- which a private individual naturally can't do as easily.
So far I haven't had any problems with either of the two, but I'm fairly certain that having an actual conflict with the private couple would be a far greater issue than taking the company to court -- not in the least because in a small town everybody would hear about it and because they're private individuals it would be seen as personal.