Phil demanding an apology from twitch is such a boomer move, the equivalent of berating a macdonalds employee before flouncing out with a 'I'll take my buisness elsewhere!' as if they care at all.
He seems to get that way when he's legit upset, which, in this case, is probably because he spent years running from his old image, and feels like it was a huge waste if he's getting de-partnered for something Young Phil would get in trouble for. Also, it doesn't take much for Phil to feel entitled to victory, and being able to avoid losing his partnership over alleged hateful slurs is definitely on the list of things he would consider victorious on his part. And an important victory for him too, as is evidenced by the dedication he has shown to being Puritan Phil. You have to admit, he has put effort into that act, a lot more than you'll ever see him put into anything else. It HAD to have meant something to him, it HAD to have mattered that he run away from Young Phil and his chicky-chang-wang talk.
I can easily see why he genuinely calls this bullshit. He didn't actually turn a new leaf, but he's Phil, so his perception is off by default, and so I can easily see him really believing otherwise as well. His head is not filled with memories of the times he fucked up or contradicted himself or didn't really sell his act, it only keeps the information that it needs in order to protect his feelings. So when he ranted and raved, he was only thinking about all the effort he went into restraining himself from using the n-word and acting like a complete Pepe Le Pew-esque motherfucker any time tits' n ass were even remotely on display.
Basically, Phil, in Phil's view, was being a good little boy and Ma Burnell still put him in time out. As for how I feel about that being some kind of injustice, it depends on whether Twitch actually did that, and what examples they're actually using of Phil's past remarks on stream. Obviously I find it hard to believe because if they just really want to get rid of Phil, they obviously had the much easier route of taking advantage of his impatience and nailing him over the 24-hour exclusivity clause that he spent years thumbing his nose at willfully. NOBODY was going to call that controversial, unlike him supposedly using hateful slurs to the extent that he needed to be de-partnered.