I really do think he's arrogant, butthurt, and secretly jealous he's not here anymore (why the hell else would he reference GeekHack in every other post he makes?), but I think TacticalStache put it best when he said:
He may be a ****head, but he's our ****head.
He did contribute a lot to the community, but he also continues to ramble on about how /r/MechanicalKeyboards is superior to GeekHack, basically just citing his wiki and traffic numbers. He also has so many followers he's like the leader of a cult, where all the members are trained monkeys who get all riled up whenever someone says something negative about their one true god, Ripster.
Basically, I said something against Ripster and /r/MechanicalKeyboards on a subreddit completely unrelated to his, and someone posted it on youknowhere and you would not believe how many comments I got from said trained attack monkeys. So really, I don't hate him, I dislike him, and I hate his followers..
Is it really that surprising why he's so negative against GH?
Imagine years of your life spent, 50k+ posts, pages upon pages of his keyboard science wiki threads. Most of which is now gone. And you can easily see why he's so butthurt. However, I don't show sympathy, as he was given several opportunities to play nice with others, but he let his ego get the best of him, much like Anakin Skywalker. Which is why it's only fitting that he has a rare Vader, having somewhat become one himself.
Obi-Wan Kenobi (played by GH): You have allowed this dark lord to twist your mind, until now, until now you've become the very thing you swore to destroy.
Anakin Skywalker (Ripster): Don't lecture me, Obi-Wan! I see through the lies of the Jedi. I do not fear the dark side as you do. I have brought peace, freedom, justice, and security to my new Empire (aka /r/mechanicalkeyboards).
Obi-Wan Kenobi: Your new Empire?
Anakin Skywalker: Don't make me kill you.
Obi-Wan Kenobi: Anakin, my allegiance is to the Republic, to democracy.
Anakin Skywalker: If you're not with me, then you're my enemy.
Obi-Wan Kenobi: [realizing that Anakin is consumed by evil and there's no reasoning with him anymore] Only a Sith deals in absolutes.
[draws his lightsaber]
Obi-Wan Kenobi: I will do what I must.
Anakin Skywalker: You will try.
[draws his lightsaber and confronts Obi-Wan]
.....
Obi-Wan: You were the chosen one! It was said that you would destroy the Sith, not join them. You were to bring balance to the force, not leave it in darkness.
Anakin Skywalker: [shouts] I hate you.
Obi-Wan: You were my brother, Anakin. I loved you.
edit: Rip RIPSTER