If someone has had a bad experience in a particular market, nothing I say is going to change that person's opinion, especially since I work with a turnkey company as Phillip pointed out.
What I will say is Brandon makes a lot of good points in his posts with the main one being about conducting proper due diligence. Learn the market and know who you are working with. Know what gets done during the rehab and how the PM handles maintenance, screens tenants, etc.
Personally, I have six rentals, four of which I acquired from a turnkey company while I was still working as a Certified Financial Planner. Several years later, I now work with that same turnkey company.
As with any other industry, of course we know our local competitors. I can't speak for any of the others but we don't like our competitors and I don't think they like us very much. Now how they treat each other, I don't know.
There are good deals here and bad deals. There are good companies here and bad ones as well. I don't think that is unique to Memphis though I've only invested in Memphis. There are markets that get talked about all the time on BP, such as Atlanta, Dallas, Austin, Houston, Cleveland, Detroit, Charlotte, Cincinnati, Birmingham, etc. My guess is that someone could buy in any of those other markets and have an equally poor experience if proper due dilegence is not done prior to investing.