You can rate a game without even playing it. So, it's likely many games with a 1- or 2-star rating have nothing wrong with them - someone was just having a bad day, or the game didn't personally appeal to them.
You'd probably be better off reading the comments, or reading reviews on sites that only allow "players" to rate the games.
I think you'll find that the very lowest rated games are not actually all that interesting to study for things to avoid. Games that bad don't happen accidentally. Either somebody was actively trying to make a bad game to play a joke on the player, or somebody just put no effort at all into making their game good.
