I got married at 51, and can tell you that dating hell isn't in your 50s, it's in your 40s, with nothing but unavailable newly divorced guys, broken promises, and go-nowhere relationships.
But like you said, by 50, something shifts. You get more comfortable in your skin; you become more accepting and forgiving, less angry and bitter. You also realize that no one’s perfect, that we’re all flawed, and because of that, "settling" takes on a new meaning. It’s not such a dirty word anymore. Settling is not lowering your standards, it’s making peace with where you are in life, and who's in it.
Once you release your death grip on hope and expectations, somehow love finds you.
Wishing you all the best Iva!