As I've said, I don't see anger as a completely useless emotion as long as you can channel it and use it for your advantage. J9 said how he's put his anger on a slow burn and his ex is going to regret she ever walked out. I am on a similar path.
I make sure that I do things to destress and get out the anger so that it does not bubble over. But over time, you can let it subside and get it on that slow burn.
So, come here and vent and thrash as much as you need to. But make sure you're doing something IRL that helps you get that release in a safe controlled way - lifting weights, climbing, biking whatever.
Another awesome thing - my lifting and strength training gets hella better when I am a bit angry. The motivation is through the roof and I feel so accomplished.
I know that I am going to be laughing away all the way to the bank with W left watching what she let get away. It's gonna be a priceless moment.