The first is the user experience.
Navigating DeFi platforms is clunky and takes time, even for seasoned crypto investors. The steps typically include setting up a wallet and securing the recovery passphrase, acquiring specific crypto assets, swapping, bridging across blockchains, and signing multiple transaction messages.
The second problem is bad actors.
Like traditional finance, DeFi attracts increasingly sophisticated scams, fraud, and hacks. Researching the most trustworthy DeFi protocols can be overwhelming for any investor.