Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.
I think it's still intended to be Ultra interfacing with the readers directly. I think the text becomes purple because that's when he starts getting 'Gentrified' by Intellectron. /shrug
__________________
"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
Ultra Comics went back in time with his eye working as a portal for The Oblivion Machine, or rather the Gentry for this. He created a paradox allowing for everything to happen. We see this with Intellectron behind the desk dude midway through the comic, and the next time he kills him. He gets fully infected when he travels to the past, but might not realize it fully. He then travels back to the future.
The purple text is the first time we get Ultra-Comics' thoughts after he's been infected. All his thought text was grey until he went through time. It's basically saying, yeah he's ****ed. Also, you could have stopped this but you kept reading and allowing the situation to get worse.
At least this is what I make of it. Don't listen to me though, I've almost fully lost my mind.
Though this aligns with what Mindset said here, so maybe it's correct.