What your experiencing is ar15 snobbery. Its mainly from people with little real working knowledge of firearms parrotting what they heard on voice chat while playing modern warfare...
There are different grades of ar15 the same way there are different grades of every product in life.
Is a pof bcm dd colt scar better than a bushmaster?? yes. Does it mean that the bushmaster is complete junk?? no.
The bushmaster, m&p, dpms etc serve a specific market of shooters who want a rifle like the ones our military uses or ones they were issued or just cuz it looks cool but which is prolly only going to be used a couple times a year at best.
They also serve well in things like law enforcement where it may get shot once a year with less than 500 rounds going down the tube in a decade or more spending most of its life bouncing in a squad car's gun rack.
Then there are folks like me who want something top end just because its top end. For this a bushmaster wont cut it
Then there are folks who take those guns out and put 15000 rounds downrange training in a year and want something that can handle that kind of abuse. Bushy wont survive this role either.
So it comes back to why should joe down the block have to buy a top end gun he will never see the benefit of its durability or even know the difference?? Thats the market those are aimed at.
Here on ftf its ok to have a negative opinion of a product or service or company, but its not ok to beat someone over the head for picking a product you dont agree with.
Personally i think your tossing money away on a bushmaster when for a few sheckles more you could get a colt or rra or bcm or psa or dd and have a rifle that retains waaaay more of its value than the diff in price. But if it serves your purpose whats it really matter in the end??
I dont judge you by what gear you have but how well you treat your fellow forum member.