[speediva]

That's quite a predicament.

It sounds like he is a rebel without a cause. Sure, he can be mad at himself and others for the wreck, but after 5 years he really ought to keep that anger inside with ease. If he can't, there is something unhealthy about this attitude/temper of his. I wouldn't necessarily say to leave him for it, but try to work with him on calming his temper and directing the frustration and energy into more constructive facets. For example: if he gets physically violent (hits the steering wheel, stomps his feet--I pray not hitting people) then perhaps a first step could be for him to verbalize what he feels. A good scream about a "donkey-raping, sh*t-eating MFer" might just be as good as pounding the living crap out of his poor dashboard. From there, maybe decreasing the intensity of the commentary would be a good next step.

Unless you feel threatened by his attitude, I wouldn't leave him. I personally think you should hold a VERY serious conversation with him about your concerns for his emotional well-being. If he is entirely unwilling to work towards a goal, then that might be a sign that time is winding down for the relationship...

~just my pocket change~