What is the drawback of OpenSea?

As a cryptocurrency enthusiast and investor, I'm curious about the potential pitfalls of OpenSea. Could you elaborate on some of the key drawbacks of this platform? I've heard about its popularity in the NFT market, but I'm also interested in understanding its limitations. For instance, are there any issues with transaction fees, security vulnerabilities, or lack of customer support? Additionally, I'd like to know if there are any challenges for sellers in terms of liquidity or exposure on the platform. Understanding these aspects would help me make a more informed decision about using OpenSea for my crypto transactions.