Well on the theory that the original post might be some sort of meme-parody I googled "This is not a threat; this is the truth" as the distinctive phrase that seems least likely to have been changed. The results all seem to involve Uganda or vampire media. In any case I don't care enough to pursue it further.
As for the content, the truth is that anyone with time and skill can create their own D&D to suit themselves, and WotC has now creative commonsed more than enough to create your own 5e clone with comparative ease. The reasons official D&D will continue to reign are: 1) There's a massive marketing machine compared to any competitor in the space, including massive free publicity from the D&D brand being a cultural institution. 2) The userbase that marketing brings means that there's always plenty of people to play official D&D and many of people who went to the trouble of learning it don't want to learn another similar game when they can just play official D&D. 3) The continuous series of products produced for offical D&D add value for players, would dwarf most potential competitors, and feed the aforementioned marketing machine. 4) The fact that creating an independent version of the game is unnecessary to many people who are discontent but basically like the game; you just houserule as you like and don't buy products you don't like. 5) The people who are discontent with official WotC D&D are not a monolith who will come together to agree on a single grand unified independent D&D.
Personally I didn't buy ENWorld's 5e clone, which of course already exists, becuase of reasons 2 and 5.