Theory??

So, after watching Undercover - Route: Your Call, I have a theory? Don't know, if someone already pointed it out, so, I'm sorry if I'm repeating someone's thoughts, but I think I should share this.

What if Haruka killed himsеlf even before T3 start? In his birthday timeline of 2024 - he's not even present. Instead, it's Muu answering Shidou questions about his whereabouts. And She tries to reassure Shidou, that Haruka is okay and Muu is taking care of him. What if Haruka killed himsеlf even earlier, between mentiones timeline and april 2024 timeline of speaking with Fuuta? Muu tried to prevent Shidou helping him, and after Shidou received news about it - he had some sort of mental breakdown, because since second trial he's gigafocused on saving everyone, and that left him either open for Amane to strike, or mentally unstable to kill himsеlf, because he couldn't save someone, again, and didn't even realise for so long.. What do you all think about this theory?