Earlier quoted context omitted.
> I also really dislike the App Store. [...] I used to _love_ it, I would check weekly for new things I used to do this too, and like you, I've now grown to really dislike it. My reason is different, though: the App Store app has _plummeted_ in quality. It's now so hard to use, I don't bother using it. 1. The UI is all over the place. Some UI controls cause pages to swipe up from the bottom. Some cause pages to swipe…
I used the OSX App Store for the first time in years a few days ago. For the life of me I could not figure out how to download a simple free app. I had to ask my SO, who usually comes to me for tech questions, how to use it. Keep in mind I've been using computers for decades and have an above average understanding of UI design. 1. Upon clicking the App Store icon and entering my apple ID and password I get a 500 erro…
For #3, here’s how I’d explain it to someone who hasn’t used it before (you may know this already): your Apple ID is tied to the “purchases” you make across the App Store, iTunes Store, Books, etc., so that you can access what you’ve bought on a different machine. If you buy a paid app, it gets added to your Purchases list so that you can download it on another Mac without buying it again. This ties into Family Sharing so that up to five other people living in your household can use it too. Free apps also get added to the purchases for syncing purposes across all your devices. The cloud icon indicates that you’ve purchased an app and are eligible to download it for free.
TL;DR: you got a strange series of bugs that probably haven’t been seen by anyone else all together