Anger management programs for emotional or verbal abusers sometimes produce short-term gains that disappear when follow-up is done a year or so later. That was probably your experience if your partner took an anger management class. If you're lucky, you may have seen a lower tone to the chronic blame - anger management classes sometimes turn a yeller into a stonewaller.
The worst kind of anger management class teaches men to "get in touch with their anger" and to "express it" or "get it out." The assumption is that emotions are like 19th century steam engines that need to "let off steam" on a regular basis. These kinds of classes include things like punching bags and using foam baseball bats to club imaginary adversaries. (Guess who would be the imaginary victim of your partner's foam-softened clubbing?) Studies have shown that this approach actually makes people angrier and more hostile, not to mention more entitled to act out their anger. Participants are training their brains to associate controlled aggression rather than compassion and reconciliation with anger.
Hopefully, your partner did not attend one of these discredited classes on anger expression. But you might not have been so lucky when it came to the second worse form of anger management: "desensitization." In that kind of class your husband would identify your behaviors that "push his buttons," things like you "nagging" him or asking too much of him. The instructor would then work to make those behaviors seem less "provocative" to him. The techniques include things like ignoring it, avoiding it, or pretending it's funny. Didn't you always dream that one day your husband would learn to be less angry by ignoring you and avoiding you or thinking that you're funny when you ask him about something serious?