Most of my matches are competitive, but there are certain opponents that drive me nuts. Fighting Mighty Mouse, Cruz and Amanda Nunez really is a pain. Their footwork is so fast that it's very hard to get in range. When you do get within striking range and you throw a strike, they can counter with the pre-set 4 hook combo (left-right-left-right). This combo always lands, because it will always interrupt your strike, even it it's a jab. And if the first hook lands, you can't get your block up in time to prevent the next shots from landing.
Furthermore, I've encountered some strange things. I was fighting a Woodley with Thompson. I was winning the striking exchange and then he took me down from the clinch. He was in half guard and threw an elbow. I was pushing the right stick to transition, but literally nothing happened. I could not transition and after another elbow, my block stopped working as well, resulting in a TKO. I had the same things happen while striking, trying to throw a kick or punch, but nothing happens and my fighter just stands there looking like an idiot. They really need to fix this.