To start off, I have snapped my rear axle on my current bicycle four times already. Usually the wheel never "dislocated", so I was fine, but the last time I almost drove off a 10m drop because I almost lost the rear wheel. (It got stuck between the seat pole thing and was held on by the chain.)
I have no clue about bicycles though. I just bought what the dealership recommended to me at the time of purchase. (I would gladly read up & learn about that stuff, but I have the case of mountain stupid, where I do not even know what terms to look up...)
I have been riding every day on a relatively steep decline / incline (~20%) which is paved with beton (concrete) blocks, and I am quite heavy (120kg with clothes). That weight is still under the "rated for" weight of my current bicycle, but I'm guessing the axle snapping is caused by my weight.
The bicycle originally had a "tube" axle which you could tighten with a lever. Originally I replaced it with an identical one, which also snapped so I tried replacing it with a solid one, hoping that would be better but that snapped too. Twice.
I am really unsure what to do about it / what to get now, and was hoping I could get some advice of what to look for. I live in Europe, so if you are going to recommend a product it would be great if I wouldn't have to import it.
My current bicycle is from a company called "Bulls - The Ride You Want", but I couldn't find anything about them online except for a really crappy advert on YouTube.