The Divorce

What is the difference between divorce and annulment?
For of all, I hate divorce and I fear if I married one day, I’ll get divorced and lose what I worked hard to get since the US court system is gender biased.
My parents have been going through a nasty divorce for almost 2 years and my dad says men are typically screwed after the divorce.
Would it be better if a couple had an annulment instead of a divorce?
Divorce is required if you been married too long to have it annulled !!