I haven't read the whole thread, haven't took the time, however, I'd like to say, I've had a few good tips from people who've done really well in business. One of them was never put the opposition down in front of others. Makes you look and sound desperate. I'm still trad for a few reasons. If I lived in UK with the domestic windows and access problems you guys get, I would be 100% WFP. When I see bay windows with tops and sloping roofs with dodgey tiles etc etc. It's a no brainer.
I also think the guy has a scattered round and has problems pricing up his work. He will be thinking "How can others earn enough at this game without cutting corners".
The truth is, when I first started, I had old salts working for me on domestics. It was these guys that showed me how to fan a window properly, and I was employing them!!
They showed me how to work smarter instead of just harder. Why we clean 2 panes next to eachother instead of one at a time etc etc.
I suspect nobody has shown him this sort of stuff and he can't see himself getting anywhere or getting faster. This will make him bitter and give him this negative attitude to WFP guys or guys that are cheaper. With time, he'll get himself sorted. If not, tough. Get another job.