I've dealt with both; anecdotal but I had a much better experience with the individual landlord than corporate. Ex: AC went out in both cases; Individual land lord showed up with a replacement window unit the next day after I reported it. Corpo landleech ignored my ticket and calls for 3 days while I slept in a house that was nearly 90F inside past midnight.

Corpo landleeches nickle and dime you (base rent + rent payment fee + pest control fee + trash fee + valet trash fee + fee for the service that bills water/sewage + mail room fee + others I'm no doubt forgetting) (but they only advertise the base rent), and they like to push straight up scams ( such as forcing mandatory renters insurance at 3x the market rate, expensive "benefits" packages with everything from HVAC filter delivery to credit monitoring, all heavily marked up.). The individual land lord? just a flat rent every month, no surprises.

I'm sure there are plenty of horror stories about individual landlords though; the same greed drives both to cut corners and maximize profits.