Also, you might want to check out SudoSwap, like uniswap but for nfts. Here is good article regarding same [1].
[1] https://www.coindesk.com/learn/what-is-sudoswap-how-to-use-the-nft-marketplace/
It's not like you've had any other choice. This industry is still in its infancy, so we should expect some level of centralization in the short-term. Long-term speaking, it's likely decentralization will become the dominant force in the crypto/Blockchain industry. That's a big IF, because things are pointing in the wrong direction. Centralization might increase if Wall Street continues to take part in the industry. The NFT hype isn't over yet, so the best is yet to come.
Among all the marketplaces available, I think OpenSea and Blur are the best ones yet. Magic Eden is growing to become the third one on the list. I've yet to try SudoSwap for trustless swapping of NFTs. Thanks for sharing, btw. With all the buzz surrounding NFTs, I wonder which NFT will become the next big thing?