Is your spouse a 2x2 and you are not?  Perhaps you were a 2x2, and then you left but your spouse will not leave it.  It's a big problem in your marriage that's for sure. You've probably spent thousands of hours trying to explain to your spouse the problems and lies of 2x2ism, but they don't listen or don't want to believe them.  You feel frustrated. You don't know what to do. You are probably angry with your spouse for being so unreasonable.  However, if you tried to reason with your spouse and it doesn't work, then you have to change tactics.  You cannot reason with someone in a cult. But what you can do, is use cult tactics against them. Do exactly what the 2x2s do to convert people, but instead do it to them.

No matter what you believe about God or not God, do not become an atheist.  This will make your spouse think you are even crazier than they already do (for leaving the One True Way).   In your town or area, visit every mainstream church there is.  Talk to the priest/pastor/minister to see if they have a nice personality and if they are knowledgeable about the Bible.  When I say mainline church, I mean Baptist, Methodist, Presbyterians, Lutherans, Anglicans, Catholics, Congregationalists, Episcopalians, United, Reform, etc.  I do not mean JWs, 7th Day Adventists, Mormons, Church of Christ, etc.  It is very very important that you avoid any church which says it better than other churches. You want to hear the priest say that the church is comprised of all those who are Believers in Christ.  After you have visited all the churches, start attending services at a few churches (four maximum at a time). Go as much as you possibly can. Your purpose is to meet the members of the congregations and make friends with them.  It is very very important that you go up to people in the congregations, introduce yourself, and be super friendly with them. Once you have cultivated friendships with people at the churches, make a choice on which church you think is the most friendly and that your 2x2 spouse would feel most comfortable with the people.  You must be very careful that you make this choice well, because you might only get one chance to impress your spouse with the congregation. 

If you have at least 10 friends in your new church that openly are friendly with you, then you can invite you spouse to come one Sunday with you to church.  Do not press it if your spouse doesn't immediately agree.  You will get more chances, just wait for the next steps.   You must attend the church you selected very frequently - as many times per week as possible. You must learn as much about the church as possible. If they have any doctrine classes, you must enroll. If they have any social clubs, you must join as many as possible. The idea is to get yourself as integrated into the church's social structure as much possible, as quick as possible.  If you keep up this high level of social activity at the church, soon you are going to be friends with almost all the congregation.  If there is a chance to get on a board of directors of the church, do so.  Start inviting a few church members to your home for socializing, they are your friends after all; things like tea, dinner, etc.  If there are any organized potluck dinners or sports things, or kids activities, you be there all bright eyed and bushy tailed. The point of all this is to show your 2x2 spouse how much enjoyment and fulfillment you are getting from your new church. These feelings are real after all, so why hide them from your 2x2 spouse.   Invite your 2x2 spouse to participate in some of your churches social activities, to socialize with your new friends in your home, etc.  Basically try to get your spouse to realize that your new friends are great and that spending time with them is pleasurable for your spouse. In front of your spouse, have discussions with your new friends about Grace, Trinity, Matt 10, etc.  If your spouse hears this enough from nice people (and nice is the key thing here), your spouse will start to think that it just might be correct.   Soon you can ask your spouse to join you for a few services at your church. Maybe not Sunday, since they have 2x2 meeting, but maybe a bible group on the weekdays or a weekday service or a late Sunday service.  Slowly but surely, your spouse will start to realize that all the lies the 2x2s tell about other churches are just that - lies.  And soon your spouse will come over to your side, and your marriage will start to heal.  It's a long process, don't give up.  And make sure enjoy your church as much as you can. You happiness will be real, and it will be infectious.

Good Luck!