Why can't you see the obvious and understand the that Four God System is broken and doesn't accurately represent all Chaos worshippers opinions? Why do they have to shove themselves into these arbitrary categories? Why do you hate the little man and the free thinker, especially given the Big Four claim to represent Freedom?
Put another way:
Who died and gave you the right to decide which Chaos gods are cool and which aren't? Malal defies your commandment to make things make sense. To do so is to oppose Chaos! To demand logic and reason is to declare yourself a traitor! The Four Gods: brooding, gorging, scheming, lying! They are unworthy of the title of Chaos! Usurpers! I speak of a TRUE Chaos. One that takes Chaos to it's natural conclusion: Destruction! Death! Letting the Galaxy Burn! The only one to decide that there is nothing in this pathetic, corrupt galaxy worth living for.
Ask yourself: what is the Chaos god of Hate? Of denying your basic humanity? Do you claim instead that such a thing does not deserve a god? Ignorance worthy of the foolish followers of Tzeentch, those who claim knowledge in the face of the unknowable! Is not the fundamental article of the Imperium of Man: Denial of Chaos? All emotions manifest in the warp child. All of them. Any fool philosopher knows this much. But you claim the Emperor is not a god then? Then where does this hatred go? Where does this Madness lead? Denial of Chaos must manifest in Chaos too! Denial of yourself, and what makes you human, leaving only a husk bereft of pity or feeling. Chaos claims it is hated for its Freedom; By that token, is not Malal the only TRUE Chaos? When you are hated ALL, then you are truly free. Malal does not promise a false Utopia. It does not promise reason, or passion, or wisdom. In fact, to serve Malal is to accept the inevitability of your own death. Embrace it! Don't pretend that honor, or schemes, or pleasure, or life, have any real meaning. Malal isn't about schemes or fighting or rage, it's about tearing down Creation just to see if you can! Sure that will kill you; why not? It's not Chaos Divided, it's Chaos Unadorned. Without the lies the False Gods tell you to make you feel better about yourself. To trick you into thinking that something matter! But they are lies! Empty lies made to you to increase their own power!
Abandon everything. No Ego. No Passion. No Hope. Embrace Hate! Embrace Contradiction! Embrace annihilation!
Such is the Decree of Malal! For the Renegade God!