I really wanted Coral Island to win the chill game category. That game is legitimately great, the first of the "Stardew clones" era of farming games that is actually good on its own right.
Dave the diver just comes off to me as a massively advertised bleh
I've been playing Dave the Diver for a while now and honestly, I really like it too. Dunno about the massive advertising since I heard of it from word of mouth, but I've been genuinely enjoying it.
It's been on the front page of steam for every sale this year, and near the top of the page other than that. They frame it as an indie hit, but the dev is owned by Nexon which is among the largest game publishers around.