Thanks for playing (and for streaming) and for the helpful feedback! That's a really cool idea about the brief reveal! One of the stretch goals we had that got tabled due to jam reality was adding artifacts to the game, and one of the ideas I had for one was actually similar: it would briefly reveal one or two cards at the start.
I think your criticism is valid, the game doesn't do a good job of conveying how combos work (I think it could also help to highlight cards in the store that combo with your deck), and there are probably too many cards that self-destruct or destroy other cards in the early game, which make it really easy to self-sabotage your deck in the first few rounds.
Ultimately, this is probably a lesson that deck-builders are a risky choice for a jam since they require so much balance and playtesting.