Private insurance used to offer flood insurance like 100 years ago, but to stay in business they had to raise premiums to a point where no one could realistically afford it (which is to say that living in a flood zone is not financially feasible for most people). The government had to step in with their own flood insurance program, which was tied to regulation intending to minimize the risk of flooding in at-risk zones so that premiums could remain affordable. Even these measures haven't been sufficient to keep the program from running out of money, and we've been subsidizing it with taxpayer bailouts to keep it afloat.
All this is to say that private insurance is literally incapable of insuring against flood damage, so you can't blame them for any of this. If you want to blame someone, blame Trump for rolling back standards that would have allowed FEMA to consider climate change in their risk models.
But first I think he's going to pardon Hunter Biden. He'll get to look like he's rising above politics (despite Hunter not being a political figure) while painting Democrats as hypocrites for prosecuting their political rivals. Then he'll pardon anyone associated with January 6th, using the Biden pardon as cover. Then, once he's proven all the fascist rhetoric wrong, he'll seek his revenge.