First this should be on the classified page and not here Looking for a team.
Second just because you didn't enjoy the current tools that arent enjoyable for you doesn't mean you have to create a whole new engine.It's sounds like you haven't fully created something with it.
You haven't specified your target and your experience about programming.
Creating a game engine is very risky and needs alot of time.
There is a article here in gamedev called Create Games Not Engines. Its recommended to read it and not inventing the wheel again.To be honest with you I have never heard this from a seniors perspective.