The Bitcoin Core developers have failed to deal with the scaling issues. Segwit, which is the proposal of the Bitcoin Core team to solve the issues was not very popular. 
Bitcoin Unlimited propose the very big block sizes and they say that this will solve the scaling issues. But at the same time, Bitcoin will become even more centralized, because as far as I understand it will be more difficult to mine.

At this time, there is no consensus in the community so a hard fork will probably bring chaos.