I havent ridden many downhill bikes but Id probably err on the side of strength over weight if I were you, since it sounds like you break fames easily.
Giant Glory’s are pretty strong I think, never heard of a broken one but they are quite heavy. However, there cheap and can build into a sub 40lb bike.
Also, Ive never really heard of many broken V10’s either, however they could be overkill for your riding. My mate had a VPfree and that rode nicely.
Or you could go down the specialized route, who offer a good warrenty and dont seem to faff about replacing broken bits.
I probably wouldnt go for one of the new raceligght frames like a socom or 88 since theres a good chance you’ll end up damaging them. The 88’s are meant to dent very easily and I think the socoms have/had issues with cracking, but they are pretty light and my mates rode nicely