I don't consider him as a Hero because he was just selling his share and fault in the FTX lead to all this collapse and he also tried to buy it which could have balanced the situation but in the end nothing happened and people lost the money.But if we are calling CZ hero in this case then you are overlooking the scene that he has taken the opportunity to take out his competition from the market.
If he did buy the exchange then many will consider them a hero but that didn't happened for some reasons but it was a good thing because owning FTX will make them a monopoly in the crypto world and something bad will happen later on so we shouldn't feel bad about the crash and another good thing about this is that it helps us buy more coins at a discounted price.
If we only invest in the standard cryptos (not on an exchange token) and we only hodl our crypto in a wallet that we have full control of, we shouldn't worry because the loss that we experience are only temporary as long as we don't sell because standard cryptos can always recover.