He could very well be out buying a new toothbrush that lights up.
Seriously, hrm, it takes time to learn the fine art of detachment. Each person moves at their own pace. Quite frankly, I think you are doing well, considering he's still under the same roof w/you. I would have been sorely tempted to spice up his tacos a bit for him. You know, light the fire and see him go to the moon and circle back down.
Maybe you need to sprinkle some fairy dust on that toothbrush that continues to move around the bathroom. Maybe the fairy dust will help to glue it down. BTW, I'm still laughing over that one.
Bottom line, give yourself some time...you've learned the first step, i.e., your sense of humor has returned and you are starting to see the humor in his crazymaking ways. You've learned to come here to vent and yes, you are going to have ups and downs. Time is on your side.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.