Do you have a rating of errors for which users voted?

I want know how many people wait to fix very important bug

The CC list size and Duplicates count indicate that. CC list is a kind of “voting”.

But in general, for a bug to be fixed, the “voting” is irrelevant. What is relevant is that a developer who is interested in the bug would appear. LibreOffice project is a community where nobody can force you as a developer to work on whatever you don’t want.

Well, you can always try to contract a certified developer or company providing professional support to fix your pet peeve bug for a certain amount of money.