I’ve looked at terms factoring in what it means to the users with phrases like self-controlled, 3rd party owned, etc. but they all sound shite and look more complicated written too.
The other way is you basically just ignore custodial wallet language completely and then focus on making self-custody language more obvious.
Because comparing to a bank, we know the bank has our money, applying that logic >>> why are we explaining this to people unless we have to. It’s a fun area to explore there for sure!