It took you 3.5
days??? Wow, you're way more patient than I.
For future reference: I attended a Ricky Tims seminar. He demonstrated (and had all of us try it with much success!) how to rip such seams within seconds. You rip the first couple of inches, then grab the fabric, one in each hand, and quickly pull it apart, as if you were ripping yardage. It works!