The bitter taste sounds like you had too much smoke, was the smoke white? I have not used the JD chips, but sweeter and milder woods pair better with sweeter meats mixes like teriyaki.
Did you use 80/20 beef? It may have been too lean. I usually shoots for a 70/30 meat to fat ratio or a 85/25. You can use 80/20 but you really have to watch your pit temps and make sure and pull at an IT of 152°-155°.
Your pit temps at the end were too high. I never go above 180°. Above that and you will get fat out causing dryer meat. Your final temp was too high in my opinion for sticks ad sausage. I take mine to 152°-155°.
Try starting at 120° then bump the temp 10° every hour until you get to 180°. It takes time but your final product will be much better.