I am not sure if any hate is warranted, but it is true that coming up with a new license which does not comply with open source licenses, and proceeding to call it open source definitely did not help to create sympathy.
There is nothing wrong with releasing something under a proprietary license but calling this license change "Doubling down on open source" is damaging.
https://logz.io/blog/open-source-elasticsearch-doubling-down...