In SC2, the game became a lot more streamlined and automated so you as a player don't really get to express your play style as much as in Brood War. The game kind of has a very blunt set of rules about what counters what and as a player your job is to focus mostly on macro/economy, scouting, and unit production, you build up a kind of death ball army and then send it into a battle that lasts under a minute and whoever wins, wins.
Another annoying aspect of SC2 that's a consequence of how automated the game is, is that it is also often very cheesy, where an opponent can rush out an army that's very easy for the computer to control but the defender has to click like crazy to defend it. I'm fairly high level in SC2 (top 4%), and I can literally tell an opponent I'm going to "cannon rush" them, which is a cheesy strategy that has a very specific defense. I can even tell my opponent what that defense is, and they will still lose to it because the defender needs to click like crazy to defend it while I can let the computer basically do almost all of the work for me. The same goes for a bunch of other cheesy strategies where you rush out a small number of units that the computer has an easy time controlling for you, and force your opponent to have to literally engage in very awkward and precise hand gestures in order to defend the attack, and the vast majority of people simply don't know or care to learn to move their hands that way.