You are correct that it is a rant and that it could have been written better with additional parts of the correspondence to make a more convincing point. Note

You are correct that it is a rant and that it could have been written better with additional parts of the correspondence to make a more convincing point. Note however that the forum I linked to where the post was shared is a forum visited by hosters/ISP's and quite a few of us recognize what the author is saying. Seems there will be a follow up with more details.