Happens.

How old are you anyway?

The suggestion for EPO is off. Obviously the poster has no clue how to dope correctly.

As to a more expensive bike or not riding with a steel bike think about your problem here. You keep saying it's the sprints in the crit that's giving you the problem. I'd suggest a stiffer bike and lighter wheels.

If you would consider doping think about HGH and testosterone. And if you're gonna do that be sure to do what datlas says and get a power meter, do intervals and get a coach. Be a shame to not focus those hormones.