the thing is, you are happy the SA abuse didn't happen, SS are happy the SA didn't happen
Look at it from his pov, he is carry on with his life, seeing his daughter, being exceptionally generous to his ex, and suddenly out of the blue he gets the worst possible allegation and is investigated for sexual abuse.
I don't understand why you don't understand how furious and distressed he is going to be.
The money and housing he promised you is a non issue here, cos you can provide that for yourself.
Either your daughter has been sexually abused (unlikely from what you have said) or your ex has faced devastating, life destroying false allegations.
Either way, this isn't about you, and your desire for as much money as possible. You are already getting maintenance, you are already getting housed, you want so much more, and don't seem to be able to put yourself in his position at all
He isn't gaslighting, and he isn't being unreasonable