his tweets was/is a segway or natural progression from his early days.
He used to use sensationalist 'newspapers' a lot, and very purposefully.
He would plant an article on a hot topic, generate public interest (pos & neg)
and then proceed towards his goals from there.
Tweeting is more efficacious and much more handy.
My personal take on people 'not liking that he tweets' is:
They hate the content and the fact that his word, views, plans, opinions get out to the public...the main stream media hates that = they want to control the narrative =
a power taken away from them by tweets from a bold man with a plan...