If it's taking over everything and everywhere, I'm afraid it's Goutweed, AKA Bishop's Weed and many others.
https://en.wikipedia.org/wiki/Aegopodium_podagraria
I've read that goats love it and that the gout in goutweed is a corruption of goat. Needless to say, I don't love it. It magically appeared in my back garden space around five years ago through the
fence dividing my
yard from the neighbor's. One year I had a nice young man dig it all up and sift out the
roots. It came back. I've been pulling and sifting for roots ever since.
Good luck!