In reply to HenryCowan:
Do you actually know why you're failing onsight attempts when you do?
Can you read the moves right first time most times?
Can you do the moves fresh?
Are you fit enough?
Do you rest enough on the route and on the floor?
Do you trust your partners completely, 100% no doubts?
Can you really commit above the bolts?
And above good gear?
Do you know how good your gear actually is?
Is your pacing good on the route?
Can you exploit sneaky rests/shakes?
Are your tactics good (eg choosing the right shoes, going for a flash rather than an OS where holds might be dusty or bolts badly placed, stick clipping the 1st or 2nd bolt etc etc)?
Can you keep climbing pumped?
Can you do the hard moves pumped?
Does it alter your commitment above gear/bolts?
What's motivating you to climb harder, is it enough?
Sounds like we're at similar stages (though it took me a decade longer to get here). For me there is no single simple solution on the bolts, I don't suffer from a commitment problem but I do need to be much fitter and the moves need to feel easier (stronger and or lighter) and I need to get more crag-specific experience reading the routes to increase my onsight success rate in the low 7s. Another 'problem' I have is that I'm not actually that interested in onsight sport, it's the process I enjoy more than the 'tick'.
On gear it's a little simpler, I'm a coward. I don't get on enough routes and I don't get on enough 'hard' routes to build any kind of real confidence. I guess I don't really want it enough.
jk