I second the comment above about entering an established market.
Barring being independently wealthy with literally billions to throw at this…you’re not going to be better at what Shimano/SRAM do. Not to be condescending…but if you had a chance of making a race ready, reasonably priced group set that would be more than competitive in the market, I think we’d have heard of you already.
You need to do something nobody does. Perhaps make a maintenance free, indestructible group set built out of who knows what. Guarantee 10 years of service without maintenance. That’s something there would be a market for, and you wouldn’t have to do it better than 3 companies that have over a centuries worth of experience at it already. I have no idea how to do it. But I feel that avenue is more likely than say, trying to build lightweight 11spd+ road group sets in the $500-1000 range and gaining market share there.