The most common issue on a new install here is a header that wasn't built for the extra weight of a modern insulated door. On 1990s construction, headers were sized for the door of that decade, and if we're setting a heavier door into that same opening, we reinforce it before hanging anything - skip that step and you'll see sag at the top corners within a year or two.
Our regional climate band is moderate on heat exposure, which means we're not fighting the kind of extreme thermal cycling that cracks vinyl seals or warps wood-composite doors fast, but it's still real heat, and a poorly sealed bottom astragal will let it and the moisture that comes with Gulf-coast humidity into the garage over time.
The other failure is opener mismatch: pairing a new heavier door with an opener rated for the old lighter one. It'll run for months, then start struggling on the last few inches of travel. We size the opener to the installed door's actual weight, not the one that used to hang there.