The Chinese found their useful idiots after 2016, not to mention botfarms went into overdrive. They were very very worried about Social Media snowballing into a very conservative place. Reddit was key because the biggest conservative voice on the internet (The_Donald) was rapidly growing and interaction was immense. YouTube was filled with Anti-SJW videos and it just so happened that YT changed their TOS and algorithm right around this time as well. Twitter was propped up to be more popular and flooded with bots since it was the defacto "forum of the people." If Trump being elected was a bomb for China/NWO then think of the internet aftermath of 2017-2019 to be constant air raids.