One of my best friends is VP of one of the biggest O/H door Co's in this part of the country.
Much of what is in this thread is true.
Wayne Dalton makes low end doors for builders, rentals, and cheap people. They also make middle of the road, and high end stuff.
Not every builder uses the low end stuff, but most do. Sad, because $100 gets you into a better door.
Haas makes a better door in each category, at a better price than W.D. And, they offer outstanding warranty service.
Like everything else, you get what you pay for.
There is a simple fix for the torn opener mount, go to your local door company and buy a bolt on strut, and slide it over the top of the torn one, and bolt it on with self tappers. They cost about $3 a foot. You can go a few feet, or go the whole length of the panel.
There are also stronger opener brackets available, to replace the basic installation.
The opener bracket I have on my biggest door, which has panels that are all flush on the inside, (nice), goes under the top hinge, down the panel, and under the hinge below. So, there's about 14 screws holding it on. and it's made out of 1/8" steel.
If the door is frozen to the ground, the opener can pull on it all day, and the bracket won't budge.
They make similar opener brackets for doors with built in struts like the OP's.
A word of advice if your buying a new door: Up grade the spring(s) at the time of purchase. They almost never tell you that for a nominal fee, you can go with heavier gauge springs that will last much longer than the standard ones. :thumbsup: