Your husband's remedy is likely only through the worker's compensation system. He should speak with a local workers compensation attorney about his situation.
You potentially have bad faith claim but each state is different so please speak with a Texas attorney that handles insurance bad faith to see if that would apply in your state.
Unfortunately, these are damages not paid under Texas workers' comp law. The only two benefits you get are medical and income benefits. I recommend you speak with a lawyer that handles WC cases or call the Division of Workers' Compensation in your local area.