As a customer who gets numerous lawn and spray/fert guys showing up every week, I get turned off very fast if they start pointing out 'problems' in my yard caused by my current spray man or lawn man. They say stuff like '"see those weeds, out company would take care of the whole yard and not miss spots" "what an uneven cut, can I ask what idiot cuts your grass" "your irrigation is installed wrong, that company must be out of business"
All of this stuff is a joke. I think everyone should make a practice of not talking about another mans work. Yes, it is tempting in certain cases, but realize that it makes you sound bad.
I had the day off from work today and a guy just showed up from a local fert/spray company. He asked who I was using. After I told him he exclaimed, "they are well known for using inferior fertilizer" Trying to sell a product or service by putting down the current guy is bad.
OP, instead of writing a thread about this guy, ask him for your money.