First. Relax. Q'in is more art, than Science.
Sorry about the title of the thread "not happy" but you have to give it some time. Remember, ANY time you move to a new smoker there is some adjustment. Since you seem frustrated, time for a "smokin'" post (for the newbies, that means I type REALLY long replied)
Next. Throw the instructions away. They're guidelines, but they're not guarantees. Most people are perfectly happy with those. If they were small baby backs they probably would have been perfect.
Ask the forum (like you're doing). We'll steer you right.
Rule 1. Remember this forever:
It's done when it's done Not being funny here, but I've cooked more ribs than you'll probably see and even I can't give you one time that will always work. Why, because each rack of ribs is different weight and different thickness and different hog.
It's done when it's done, when you think about it, means you have to learn to tell when it's done. IF it's not done, just cook longer. Learning to "read" the meat will tell you when it's done.
At 4 hours, if the ribs aren't "tender" enough, just let them cook longer. How much longer? Probably not much. This week it might be 4.5 hours, next week it could be 5.5. Depends on the variables above. Longer for spares.
Falling off the bone tender is simple an overcooked rib. I don't like them like that (too hard to cut, just look at them in Ribs 101, I overcooked them on purpose for the photos) but people learned that term so long ago, it seems to be the standard. Just let them cook longer, they'll fall off eventually, especially in foil.
Wood can go bad, but more importantly what flavor of wood was it? Fruit woods won't be as pronounced. You can get MORE than enough wood smoke in a CS, don't be fooled by chunks. You want more flavor, just add more wood next time. Plus remember, longer in the foil means less in the smoke.
Pork Butts suggestions? Yes, read through the forum, there's 7 years worth of newbies asking questions so check up. Read PB 101. PLAN on at least 2 hours a pound (seems to be the forum answer, but not mine, mine are less).
Also read lessons learned for new users, it's at the top of the open forum:
Lessons for new usersHow's that? Hope it gives some answers. Just ask away.