I don't mind games that have a degree of chance in them, if it's done well and it's expected. Rogue-likes and other RPGs are a prime example, where stats affect your dice rolls, but there's still an element of chance. Things can go wrong. But where a game loses me is when the dice rolls are opaque and unpredictable, and make planning impossible. This is doubly a problem if planning is the whole point.
Enter X-COM 2. When you line up a shot, you have a chance to hit. The problem is, this isn't remotely accurate, or at least doesn't feel like it. I am currently 1 for 5 on shots with >80% chance to hit (and this is across multiple restarts, not re-loads, since it generates the seeds per save). This includes two shots where the person was literally standing in the square adjacent to an enemy, only to miss. I know this series is supposed to be hard and whatever, but hard because of bullshit like that stops being fun really quick. It means flanking is basically impossible, since you can't assume kills even from point-blank range, and the first mission at least is laid out so that you can't flank one enemy without in turn being flanked by another. The result is that you just have to sit behind cover and take pot-shots at around 50% to hit and hope that the RNG is on your side rather than the enemy's.
This is without getting into the fact that they got rid of the thing from the first game where you could "hear" enemies off screen and position yourself accordingly. You now have no idea where they may be coming from. My first re-start on mission 1 came from the fact that the second round of enemies spawned, got cover on my flank, and killed one of my people in a single turn.
I enjoyed Enemy Unknown a lot, at least until the late game where I have a squad of unstoppable Colonels and I was just grinding psychic powers. But this stopped being fun in the first mission, and I'm done.
So, to that end, what's everyone playing these days?