I love it!
No offense intended, but you must have had some pretty terrible "religion".
I've often heard over the years from "churchy" folks how you must be "close to God" to have a good marriage. While I see a grain of truth there, it's demonstrably untrue. For example, I have a coworker who is literally a "God-hater". He claims to be agnostic/atheist, but on the rare occasion he says anything about it, I realize that nobody could possible have that much hate for someone they don't believe in (he lost children). He and his wife appear to have a very strong marriage, very close and caring, do anything for each other.
The grain of truth I mentioned is this: I believe the key to success is following what I consider "Christian principles" on the subject, primarily faithfulness, selflessness, kindness, unconditional love. Call them "universal principles" if the word "Christian" offends you, or whatever, but they are principles promoted in the Bible. There are many, many Christian couples who
don't live this way, who fail in their relationships, and their are plenty of non-Christian couple who do live this way and succeed.
I've seen far too many "super-Christian" couples crash and burn, and nice, church-going families implode, to buy into the idea that merely putting a label on yourself and sitting in a pew every week will save your marriage. You've got to live it.