What happened here is basically a fireworks scenario - there was a rocket (old blockchain) and then at the time of hard-fork it exploded resulting in countless different blockchains.
Gentleman, we have witnessed digital Big Bang!

I'm not able to help the programming as well, but I do have a backup of the blockchain the day before the fork(s)

Is it of any use to upload it so people can bootstrap and don't have to resync using the network?
No use for it because nodes will sync to random other nodes and inevitably end up on some of countless forks - legit or not - and start kicking out any nodes not complying with
their version of blockchain. Even v1.1 nodes are "killing" each other and when you add v1.2 and v1.9.1 in the mix it is a real mess.