NFTs still have a bright future ahead in the crypto world. There are just lots of NFT projects that failed due to mismanagement. The market isn't in good shape so the NFTs can't reach a good status because they don't have a strong resistance to the bear market yet. If good developers will manage to handle potential NFT projects well, I'm sure that lots of NFTs will boom in the future.
I think it wasn't about mismanagement, I think they were managed very well for what they were designed for. I have seen and even talked and interviewed a lot of NFT project creators, and all they are after is making money. Sure they have tx fee, which means that if those NFT's go higher and gets sold, they will make a ton of profit, hence they would prefer if the project goes big.
But, the main goal of 80%+ of the NFT projects in the past year has been making a profit for the creator and nothing else. They would "prefer" if investors made profit too, but that is the second priority, the first is always making a profit for the creator. As long as that is the destination they want to reach, that project will never take off, and will never be a success at all.