Because they have very unreliable lights, deceptive marketing, exaggerated specs, and customer service and warranty support that is much more trouble then most companies.
And, for the record they are actually a Belarusian company that makes their lights in China and keeps a headquarters in Canada so they can claim they are a Canadian company.
As for the Prime C2 Pro XHP35 Warm, it is actually not a very good light. While it has a fairly nice body and good UI, it has a very inefficient driver and highly exaggerated specs(it's actual output is more then 30% less then AT advertises). I had one and it started to malfunction and failed in less then year with minimal use. Here is a review that shows it's poor performance...
http://budgetlightforum.com/node/54675
There is an almost constant flow of reports of issues with failures and AT's customer service all over the internet. Even though they are just a small company there seems to be more reports then any other flashlight company. Personally, I have had three of their lights fail out of the four that I tried. All failed in less then a year with minimal use and not even a drop. My experience with there customer service wasn't great either and although they eventually replaced my lights, it was more of a hassle then any other company I have dealt with in my 25+ years of being a flashlight enthusiast. My last warranty claim took 2 months to resolve and I live in the same province as their headquarters. There are many people that have had similar experiences and these reports can be found here, other forums, Reddit, YouTube, etc. And, those are only the ones that weren't deleted at AT's request(they ask customers to delete videos off of YouTube after warranty work has been performed) or removed by moderators.
Honestly, I have tried a lot of flashlights and brands over my years as an enthusiast and Armytek is the only one I wish I never tried. I would never recommend them to anyone and imo there are a lot better options out there.