That's perhaps because so many of them, are like virtually all of yours, persisting in pushing "he was killed by the government!" based, as far as I can tell, solely on him saying "I would never commit suicide so if it looks like I did, the government must have done it." Why are we all dismissing that, right? We're dismissing it because we're looking at McAfee's history. The man loved to make grand, conspiratorial statements with absolutely nothing to back them up. Take a walk through his Wikipedia page, and don't go "pfft, Wikipedia" -- I'm talking about the parts with extensive supporting links here. In a very real way, McAfee loved being a troll. No judgement on him (at least for that), but I honestly don't see how anyone can deny it was a huge facet of his later life.
I don't doubt that at the time he said he wouldn't commit suicide, he meant it, but based on other tweets quoted among these comments, he was very clearly in a state of depression brought on by his incarceration -- and, for god's sake, he'd spent most of the last decade as a fugitive. This is a man who went to extreme lengths to avoid being in prison. So when you keep asking, over and over, "What makes you think he would possibly commit suicide to avoid spending the rest of his life in prison," the answer is "literally everything the man had been doing before he was caught."