These days its difficult to get a poor scope from a major manufacturer. Even the inexpensive lines are optically very good, where they fall down is in the quality and longevity of their adjustments, but if you are someone who zeroes his scope and seldom touches the adjustments again, that is of little concern. Now and then a scope that is exposed to temperature or humidity extremes will fog up, and this can be a nuisance, particularly if it should happen with an expensive model. The worst scope I own at the moment is an old Springfield Professional, that I acquired used, the scope tube had been dented from over torquing the rings, the adjustments won't track near the ends of their adjustment, it will no longer focus, and I know of no one who'll fix it. I do own some pretty nice glass though including S&B, Khales, Nightforce, Burris, Zeiss, and Leupold. If you want a well made dependable piece of glass, at a reasonable price, Leupold is my go to brand. Aside from producing a broad product line that should answer most questions, they have a Canadian repair and warranty center that has a fast turn around and produces quality work.
That said, the high priced manufacturers have their place. The adjustments on my S&B PM II repeatedly and exactly shift my bullet impact the correct amount. The etched reticle on my Nightforce will never break from powerful rifle recoil. And my old fixed 6X steel body Kahles, is arguably the best general purpose big game hunting scope I own. But a scope doesn't need to cost 3 figures to be good quality. I had a 3-9X40 Bushnell Trophy that I had mounted on a .30/06 M-17 Enfield. I couldn't do anything wrong with that thing, it just worked with boring reliability until it was lost in a house fire. It never fogged up, and the adjustments, when I switched back and forth between long range target shooting and my standard 200 yard zero, never varied and when I threw the rifle to my shoulder, I didn't need to go on a quest to find the sight picture.
The key to getting satisfaction from your scope is to first define what it is you want it to do, then buy an appropriate model based on that requirement. A big game hunter will sometimes choose a scope with too much magnification, with too small a field of view, that results in a scope that is both too large and too delicate; the huge objective bell requires mounting so high above the bore that a reasonable cheek-weld is impossible. The purpose of magnification is to enable the shooter to see his target, and seeing a moose doesn't require as much magnification as seeing a prairie dog at the same distance. Throwing a rifle to your shoulder and seeing only a patch of hide in your scope doesn't provide enough information to enable you to make a good shot. Conversely, a target shooter or varmint hunter who tries to use a hunting scope with a heavy reticle, will have his target obscured, even at close range.