Take off with less acceleration and the sudden jink will vanish.

The airframe needs a bit of speed before it's flying better than the prop is flying. To get to the speed you need to do the acceleration on the ground before you horse it off. Watch pattern flyers sometime. They do a straight run right down the runway centerline. Looks sort of scale like. Their takeoffs are not just straight but really safe and easily repeatable.

How do they do it? Sensible use of the throttle. The first part of the takeoff roll is where you very slowly add throttle. The "very slowly" part is the important technique. You taxi the plane out, right and it steers ok. So "taxi it" a bit faster on the start of the roll and it'll steer straight and build up speed on it's own. There will be a very short bit where you might have to make a correction or two, but if you haven't slapped on too much throttle too soon the prop won't have the torque or p-effect to win the airframe/prop fight. And as soon as the airframe is flying, the prop won't ever win.

Tower has a line of very small WWI biplanes. They're all very evil handling on the ground. But they'll all takeoff with almost no sweat when you get the hang of how gently to click the throttle on the start of the takeoff roll. Unless your gear is so screwed up the PT-19 won't taxi straight, it'll take off no sweat too.