[nend]

OP is trying to get out but hasn't been able to. Adopting a "fuck you, pay me" attitude when you have no ability to leave is not a smart move.

Absolutely they should be somewhere they're more valued, but should be patient while they work out how to do that.

[worldwideants]

The argument seems very all or nothing, being increasingly visible about interviewing elsewhere might get the employer to take actions that help the OP prepare for a new job.

[isbvhodnvemrwvn]

Perhaps not in the way the OP wants though.