I haven’t owned the packs you mention, but I have my share of experience with cheap packs.
You haven’t mentioned your budget yet, but of the brands you mention, they aren’t super cheap. Of the three, the Mystery Ranch is often seen in comparison reviews amongst the other top brands. Badlands and Alps you usually don’t see mentioned in the same sentence as Exo or Kifaru. Mystery ranch can be found on sale pretty often for just over $300. You also might be near a price range that could get you a great quality used pack.
If we are overestimating your budget…the only thing under $300 id recommend is a Military ruck of some sort. You may be sacrificing light weightedness and a little comfort, but you will get an affordable, very tough, and easy to use pack that can carry over 100 pounds. But if it gets you in the mountains, it’s worth it. It’s what I use for now. But, I also have the experience with them to set them up in a way that works for my body and I know what to expect after many years, many pounds carried, and many miles walked.