Thanks for the chance to help. I am an attorney with over 12 years experience. Hopefully I can help you with your legal question.
You ask a loaded question...
How do I get a quick divorce so she can stop taking advantage of me?
a divorce can either be contested or not contested.
Uncontested; Now the fastest, (and by far the least expensive) way to get a divorce is if you can agree on the terms. If you can agree on "who gets what" there is not a need for attorneys...this will cut the costs to a very small amount (court fees)
Contested; if you can not agree, this is a contested divorce. To proceed you need an attorney or need to act as your own attorney (very bad idea). Here the parties present evidence to the court on "who gets what" and the court decides. This takes longer and involves attorney fees for both sides.
SO, if you can agree with your "soon to be ex" on who gets what, great! If not, you need an attorney.
There is no way around that.
Now...what you describe it sounds like you have a compelling case if you wind up in a contested divorce Utah is an "equitable distribution" which means that the marital property
shall be divided in an equitable fashion. And what you describe? Her antics with the insurance check and the IRS and the car? All this can be presented to the court in your divorce as you ask for a larget share of the marital property.
But that requires you to hire a lawyer...and her as well. And by the time you both get through paying the lawyers you may find you had been much better off to simply have worked it out.
So to answer the question
How to get a quick divorce?
Easy...convince her that it is in her interest (since she will save money on a lawyer)
If she refuses?
Then get a lawyer...a good one. Frankly, you may find once you do she is more willing to negotiate with you (when she finds that she will have to pay a lawyer as well)
What you describe, you have a compelling case for a larger share of the marital property...but if she will not agree with you on the terms you will need to hire a lawyer to get the divorce complete