There is no person who can be trained to write perfectly

Tell me what is perfect writing all about. 

Can you teach a fish to swim in the sea or fish tank? Can you teach a bird to fly in the open sky? 

The answers to both questions are NO for your understanding. It is because a fish and a bird know their job since their birth.

So, hiring a trainer to teach these two their job or natural abilities is a waste of time.

Similarly, if you might have noticed writing ability, is something that makes or breaks one. It means your teacher can only teach the correct way of writing words right from childhood, your trainer can only give you ideas to explore writing but it is completely YOU who is in-charge of coming up with the writing styles, writing methods, writing ideas, and everything related to writing.

So, the next time you judge a piece of writing as perfect or imperfect, make a note that beauty always lies in the eyes of the beholders. 

So, if you don't like someone's articles, you can unfollow them. But telling them how to write is a sheer waste of time because the writers are doing only what they are able to do naturally.