Even for a paranoid conspiracy theory, that's a terrible theory. You forgot to use the words "laser", "fluoride", "chemtrail", "thermite", and "Gay Mayan Leprechaun Ninjas from the year 2012." Also, of course, the Chernobyl explosion was caused by the CIA in order to cover up the fact that Obama was born in a Nicaraguan Satanic temple earlier that day... making him too young to be president.
Either the Soviets didn't realize that they had been the victims of a cyber attack because the Americans waited until the very moment that a Soviet reactor operator decided to wing it in an attempt to salvage an already highly dangerous nuclear experiment (interrupted by an unexpected request for more power output to the grid) with a reactor with a positive void coefficient... or the Soviets decided to make up such a story after the fact in order to make themselves look bad rather than take the opportunity to blame the Americans for the disaster... and that's even assuming that the RBMK reactors were controlled by programmable digital computers connected to satellite downlinks.
Satellites, nuclear reactions, computer viruses, and secretive government agencies... what a good mix for a conspiracy theory. Everyone wants to feel like they're in the top decile of intelligence. A good conspiracy theory gives people with a slight paranoid streak an opportunity to believe they're smarter than most people because they "get it". A good conspiracy theory also plays to the American folk hero of the misunderstood genius that's too smart for book learn'n and despite a complete lack of discipline out-smarts a legion of PhDs and comes up with an idea that revolutionizes modern science. It's the nerd version of the scrappy sports team that pulls it together to win it all against the bigger spoiled rich kids in the final game.
News flash: when most of the world's experts in the field "just don't get" a theory posed by a novice, chances are it really is gibberish proposed by someone without enough knowledge to comprehend the experts' rebuttals and too much pride to admit their own shortcomings.