Sounds like you need to work on your spinning.
Not everyone is a high cadence spinner. And some people are more adept to sprints than endurance. We might be physically quite difference so I wouldn't be so quick to assume it's solely technique.
I thought I could only push big gears and was on 53/18 daily then found out I could get used to spinning and now I'm around 65GI.
pretty much anyone can spin if they can be bothered.
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Sounds like you need to work on your spinning.