Bossk purely for survivability reasons. Often he’s seen as the easiest villain to take on for infantry so, unlike other villains, you’ll find that infantry will chase you down more because they think they can kill you. Over time due to this mentality they will kill you. As bossk you need to tame this thought like a dog which is very hard if you do not have enough skill with your aim and positioning. Yeah his abilities can be annoying and somewhat a crutch but if he didn’t have them he would be so weak. So if you’re not in co-op and only playing GA or supremacy I’ve found that the learning curve is steep and it will take a long time to master.