Worst broker you traded with?

There are many brokers who come into this category for me. But one broker that I really hate is Instaforex. It really troubled me especially their Anti-fraud department. First they blocked my account and the profit made, and then when I asked them for explanation, I was told that they have right not to answer it!

I will talk only about the very best. It is about FreshForex broker to do with their low spreads, bonuses and much more. So to me they are the best in my life and helps with trading and enhance chance of performing well.