[flavmartins]

I agree. I would say schedule a skip-level meeting with his manager and express your concerns. Ask him to be open and honest. If his manager does not recognize or is not willing to make the change, then either leave the team or the company.

[isostatic]

Yes, its quite possible the next layer up know there's a problem and want to fix it, but don't know they have someone willing to step up if they moved the original tech lead somewhere better suited to their talents

Alternatively they may know about similar position elsewhere they could move you to

Finally they may think you're a total muppet and think far too highly of yourself, which is useful to know (you either are a muppet, or you need to leave the company)