I've only bought from Nitroplanes once, and it was a good experience. I bought some servos right before Christmas, and the order was processed fast, and delivery was fast, so I have no complaints.

As far as your issue, crashing planes is part of the hobby. A lesson I learned a long time ago. A couple of things I was told by the old-timers when I started: If you're not crashing, you're not flying, and all planes have an expiration date, it's just not printed on them. If you're not willing to deal with that, best find yourself a new hobby.

It would be nice if you could get spare parts, but I started flying in an era where your spare parts was the pile of balsa sheets in the corner of your shop. There was no such thing as mail ordering a replacement wing. It was buy another kit, or make the parts yourself. In my opinion, that's part of the problem today. Everybody wants instant gratification. Nobody wants to build anymore. It's obvious by the way "arf's" have taken over the hobby. I myself have 3 kits in the basement that I plan on finishing this winter. None of them small projects. But, that's what I enjoy about this hobby. Building a plane and watching the fruits of my labor take flight.

It's a hard lesson, but you might as well learn it early...