Some personal user experiences:

https://vitalik.ca/general/2023/02/28/ux.html

I'll add to this list:

I once lost a sizeable amount when I sent my wallet address to a client and I had accidentally sent the Tether smart contract address instead.

How to fix:
1. Wallets should warn if sending to a locked contract (if possible).
2. Ledger should make it easier to grab your own address :(
3. Use ENS

Building getinboxzero.com and sharemint.xyz.

I also run a YouTube channel, "Learn from Open Source": youtube.com/elie2222 

Second I'll add:

We need better wallet security.
MetaMask or Brave wallet should warn if you're about to sign something that sells your BAYC for a $1.

Apps like Stelo do help fix this though. But they shouldn't be separate extensions.

Better security is coming but it needs to happen faster.