What is the reason for this person's hatred of religion after having been religious in his youth?

We ask Allah to return your husband to His obedience and guide him to repentance, for the door of repentance is open as long as he is alive. Invite him to repent. The issue of "hating religion" needs elaboration because it can carry more than one meaning. Similar stories are repeated due to abandoning good friends, as bad company is a root of deviation. One must beware of bad companions because their company brings nothing but evil.