Firstly, people are entirely entitled to their opinion and I honestly don't begrudge anyone for liking Genisys.
But that film was hands down the single worst entry in any big budget franchise that I've ever seen.
It didn't even make any sense in and of itself, let alone when you tried to consider it alongside the other movies it was trying so hard to tie into.
EDIT: I've just realised, AVP:R exists. Honestly not sure which was the biggest shitcake.