We cannot go through life blaming others, we have to take responsibility for our own actions and accept the outcomes. Passing the blame onto someone else solves nothing, and it will catch up with you eventually.
If we have done wrong, or if someone else has made a fault, nothing good will come from pointing the finger of blame. Hold your hands up and admit when you have slipped up, empathise when others make the wrong decision, apologise if you need to, then move on. Let go of your ego. You aren’t supposed to be right all the time, mistakes help us to learn valuable lessons.