Beware of other-optimizing. You and your partner probably know each other way better than someone living thousands of miles away who's never met either of you ever will, especially if they might be prone to generalizing from one example.

Beware of fictional evidence -- fictional relationships are usually optimized for being fun to watch from the outside, rather than for probability of working out times desirability for the partners themselves. (Much of the first couple hours of The Blueprint Decoded, besides being a primer on cognitive biases, are about correcting misconceptions which I guess originated from Disney and Hollywood.) If anything, take them as cautionary tales about what not to do.

I think most of what Mark Manson says is basically kind-of reasonable. YMMV.