tujna,
maybe you could turn around the lack of mercy your ex affords you, to thinking more about the mercy and compassion you can give to yourself.
i can understand your anger, but this is the time to also for you to self-reflect. is there absolutely NOTHING that you did in the relationship that you could have done better or in a more healthy way... that could have contributed to the demise of the relationship?
i say this because after the first week or 2 i started to realize just how much i had a part to play in the break-up (lack of communication, controlling behavior, not really hearing what he was trying to tell me). of course, this is a hard lesson to learn and realization to come to after the fact.
take this time for you to grow... you can do it. its all about you now!