Personally, I'm still a fan of B&H. I've shopped there for years. TVs, computers, camera and video gear, and all sorts of things. They always have the top of the line models of everything, even the hard to find items. Want to see the absolute best flat screen on the market? - they will have it at B&H. They have stuff that the "pros" at Best Buy haven't even heard of.
Also, the store is super cool. Conveyor belts in the ceiling zip around, transporting products from place to place. It's always busy, packed with tons of people. Even so, you don't have to wait long before someone offers to help you out - just don't waste their time. They'll help you either way, but you can tell they are cranking away and don't have time to chit chat. Personally I find that a relief - I'm not there to chit chat either. Anyway, the staff are all super knowledgable in their particular area. Every single one of them is like an Apple Genius in some specific subject. And yes there are a lot of Hasidic's working there (for non-New Yorkers, they are the guys that wear black and have sideburns and beards - I always thought they kinda looked Amish). But it's not all Hasidic's, not by a long shot. I'd actually recommend going to check out B&H in person if you are in NYC. Kind of a geeky thing to do, but going to the store is an "experience" all to itself, even if your not buying.
I moved out of NY a few years ago, but just stumbled onto their website. I think it's one of the better websites I've ever seen for ordering electronics. Definitely way better than Amazon. Luckily I still live close enough to the City to go in there in person if I have problems like the original poster.
I also have to say that I can't completely blame B&H based on the OPs story. I feel bad for him, but there were a lot of things that seemed to combine into the perfect storm of "bad service". First he tried to effect repairs himself and at hobby shops. Also there was the visible damage on the outside due to crashing it. I'm sure the first guy who gave extended the return deadline believed him, but once it arrived I wouldn't be surprised if someone on staff got the notion that the original poster was trying to pull a fast one on them. That's just New York for you... I'm sure they have to deal with people trying to return gear under false pretenses every single day (except Saturdays of course
. Add to that the fact that B&H isn't a DJI service center. Then throw in the mixup with the address... and it's not surprising this was a disaster.