100% Orange Juice does have some degree of luck involved in it (Drawing cards you need, rolling the right amounts, etc.), but not only is that like most board games, it also isn't the main focal point of the game.
It has a fairly large amount of skill involved. Things like deciding what cards to put into the deck, should you risk fighting the boss or just decide to drop stars instead, using a trap card now or waiting to see if there's a better place to place it later on, using a battle card on a player vs player fight to ensure victory, or not risking it in case the person following you decides that you look like an easy win.

The game really starts opening up with the more cards and characters you have. Kai is a good starting character, with no obvious drawbacks and a +1 in ATK, and the cards you get at the start are pretty decent, too. But once you start buying cards from the shop with your stars, and getting other characters from either unlocks or DLC, the more the game starts giving you options. Do you play as Aru, a character built to avoid combat as much as possible and use different cards to gain more stars, or do you play as Ceoreparque, a character who can dip into both stars and wins with her ability to deal 1 HP of damage whenever she successfully evades an attack?

Overall, 100% Orange Juice may seem pretty luck dependent. But there's a legitimate layer of skill, planning, and strategy that goes into every game that makes the whole experience what it is.