Super simple analogy I like to use:

You're a kid and you go to a badly run daycare with nine other kids. Your parents pay for your stay and the person running it gets a daily shipment of food from that money, let's say, eleven sandwiches [a convenient but not perfect stand-in for workers generating the resources and value for the bourgeoisie]. He should keep one for himself and give ten to the kids, so everyone gets one sandwich, but instead he keeps six and gives all of you five, so you only get half each which is barely just enough. Now, five more kids join, their parents are also paying the daycare owner, and he now gets sixteen sandwiches per day. But he keeps the difference for himself and still gives you all five. Now you each only get a third of a sandwich, barely even a mouthful and you're hungry all the time. Do you blame the new kids for also being hungry and eating the food, or do you blame the daycare worker for hoarding all the food in the first place?