Maybe they are taking the plowing money and paying for rehabs???
The national providers for plowing are much like nationals and regionals for preservation type work. Paperwork, IVR system check ins, pictures etc... all BS in my opinion when dealing with lawn and snow for a customer. Some landscape companies are unaware that unless i's are doted and t's are crossed you don't get paid, that's where some of those negative comments come from.
The other negative comments can be related to the end customer simply not paying for lack of service or not filling proper paperwork. The contracts are typical - paid when paid, you can't sue us type contracts.
Here's my final national provider experience in landscaping: I was contacted by AGMG to maintain a Bob Evans, the price was OK, we were in the area and took the deal. The local customer, Bob Evans, was very happy, national Bob Evans wasn't happy with a few other locations as it relates to Fall clean up and irrigation blow outs - so, national Bob Evans decides to not pay AGMG who in turn doesn't pay us. Why didn't I get paid? I did everything they asked and then some, local management was happy as pie, heck, we still work for them - only direct now though. I didn't get paid because of someone else's lack of something - whatever that was the courts will decide.
Working for ANY middle man exposes you to anyone else's mistakes - by signing and agreeing to the one sided contracts you basically are working on hope..........
I only hope you aren't to far into them and that they make good on anything you've done.