My In-Laws are inept boors, will my husband be one too? Help?!?

If you take offense to a lot of what he does, he'll probably resent it a become worse. He won't respond well to malice, threats, disappoint, and belittlement. You should joyously nudge, cajole, humorously suggest alternative approaches, lovingly request improvement. If you hate his parents, he will find that disrespectful and take it personally. Be tolerant of your in-laws and resist looking down on them. Adversity is best left to the football field.