I couldn't remember the specifics of who was where at the time of the explosion... but that definitely kind of points more towards 'questionable writing.' I'm still hoping that 'constant animal shifting screws with memory' is also a thing, but... Eh.
However... Just because it was a public broadcast doesn't mean the MC saw it; they didn't have a mechip before going out for The Hero Project (iirc) and...I don't know if they'd have been able to catch it by any other means.
Also...I don't think the MC was necessarily a pro-Ani anything prior to appearing on The Hero Project. I haven't played the game in a while, but the only thing the MC really seemed to care about pre-THC was JK. Being on the show kind of forced them into the limelight, and their politics depend on the player.
I probably sound like I'm wholeheartedly defending the game. I'm not; if the writing and execution is... simply not good in spots, then it deserves discussion. It just seems like people are forgetting that their character doesn't necessarily know what they know. Why the character doesn't know these things in this particular case is, so far, sort of nonsensical, but that doesn't change much of anything.
...And, also, I just like to throw random ideas out for kicks
edit: Perhaps the MC doesn't remember the explosion because they're repressing that memory?