that was my exactly my experience of building with Decker too. i very badly wanted to like it, since much of it was modelled on hypercard.
unfortunately, the developer got so obsessed with intentionally forcing limitations on it (including many of the ones you pointed out) that it's almost unusable at times for building even a simple application or game.
i get what he's trying to do - but i wish it wasn't so unpleasant to build with. just having a single variable persist from card to card was an exercise in frustration 😅
i like that it exists, i just wish it was more like VB.
