Need some advice on my house.

My suggestion would be to remove all of the jamb trim, inside and outside. Use a long blade on the reciprocating saw and take your time cutting across the top and down both sides. Unless you just want to totally replace the door and jamb, if that's the case take your frustrations out on it. LOL
Good advice, thank you!

Fortunately I learned to take my frustrations out "elsewhere" in my early teens, as I broke a double pane window at my parents house when I had a tantrum and threw a screwdriver...that bounced off the floor....

$300 was a lot of money back then for a kid who didn't have a job.