Feel better now? Didn't think so.

This is an MMO. The duty finder is a luxury item. You don't have to use it nor is it a necessity, You can form a premade and que with people you know and not take the risk of getting some impatient rude person.

When you pug, you always run the risk of getting some trash people, duty finder or not. If you can't handle it then don't que by yourself, find some friends.