IMO, you have an issue with telling the truth. You make excuses. You found time to read a book your pastor gave you and sing its praises but couldn't find the time to read the book this website is based on until just recently? Then when you did, you keep using the last resort stuff? Really, dude? WTH?
You admit that you came here looking to snoop around and beat your W with what you learned? Why would she have any other thoughts as to your sincerity? That, my friend, was a low life POS thing to do. It shows a complete lack of maturity. IMO, it shows just how abusive and manipulative you can be. Why do I get the feeling that there is a whole lot more to your story that you are not telling us?
From what I read that you write, I would not be surprised to hear that your words and actions are nothing more than a dog and pony show. You want the world to see your "new" outside appearance but inside you are still the same. You strike me and a verbally and emotionally abusive person.
I would not be surprised to learn that the relationship crossed into physical abuse, as well. I am willing to bet dollars to donuts that you are trying to turn friends and family against her by showing and telling everyone what a great job you are doing. That is going to blow up in your face eventually.
You can keep playing the victim role as long as you want. You got yourself where you are and you, and only you, can get yourself back. Why should your W give you another chance? It sounds like she tried to make it work and you did nothing on your end. Now you are crying the "boo hoo my life is over" song. Seriously, what have you done that warrants her rewarding you anything let alone another chance? All the sweet praise you heap is not going to unring that bell.
She got tired of doing all the work. She got tired of carrying the load of the marriage. She got tired of you. Three or four months is not going to anywhere make up for the years of crap you dumped on her. Especially when the work isn't genuine.
I don't think you had or are in an MLC. Your pattern of behaviors are too long and extensive. I think it is just another excuse to try and justify your past. I look to see that you have a 15 yo child and, by your own admission, you behaved poorly from the beginning of the marriage.
Is it too late to change yourself? Nope. It is never too late to change. Those changes have to made to save YOU... not your marriage.
MWD says that we need to make ourselves a spouse that only a fool would want to leave. That means changing what is inside your head and your heart. Not acts of kindness and being responsible but genuine changes.
“Things turn out best for the people who make the best out of the way things turn out” ― Art Linkletter