poizon makes a lot of mistakes in late rounds, which often leads to losing rounds they shouldn't and by that games they shouldn't. He loves to do a really random overaggressive peek out of nowhere and die when they're about to win. However when his awping at the start of rounds is often very good. He also seems to lose his awp a lot in situations that are completely unnecessary.
For example, recently he was in a 4v1 situation on d2, ct side on A site, last t is coming crossover, 3 of his teammates are ct spawn, poizon decides to overpeek (full wide swing) A ramp, dies and loses his awp as the t dies 2 seconds later to his teammates in spawn. He did the same the next map on inferno. He didn't have an awp the next two rounds because of that mistake.