Well, there is no shame in losing to Couture. The Tito loss was a close decision in which a lot of people felt Vitor won. As far as his loss to Overeem, hell at the time Overeem was getting that guillotine on everyone.
You must remember that Belfort is still a young fighter with a lot of experience. I don't think that we have seen the last or the best of Vitor Belfort yet. Just my personal opinion.