Larping as a tankie is definitely a thing of immature, terminally online kids, but I wouldn't throw Lenin in the bunch. While Stalin is mostly condemned as a reactionary psychopath by pretty much everybody except a few leftist basement-dwellers, Lenin is still read and taught throughout the world. Nothing edgy in reading Lenin.
Edgy kids on the internet worship other psychopaths like Pol Pot or Hoxha.
Politically, I don't like him. He had a critical influence in the beginning of the Free Software movement, and its failure can be easily identified in the core ideas that put the freedom of the software before the freedom of the people. The fact he cared more about software than people is reflected in pretty much anything he did.
On a personal level, he seems an insufferable asshole with enough power to get away with toxic behavior. Luckily, I never had to interact with him, but his visibility for sure didn't help marginalizing toxic egomaniacs in IT communities. Being neurodivergent is not an excuse for being an asshole. He's the last remnant of an age that hopefully is over.