I, too, am disillusioned with my Scansnap, and the software is horrible. But I don’t think for me it makes sense to spend $69 to $99 for alternate software.
I have been increasingly using my phone to scan most of the things I need to scan, to the point that I have moved my Scansnap scanner off my desk to make room for my new typewriter (yes, you read that right). I don’t scan a ton of multi-page documents, and Scanner Pro has some sweet built-in animation that I can use in combination with Hazel and DevonThink to get stuff where I need it.