I went through this for literally the last 4 years before I finally got fed up and quit and went to a startup for good. The issue is entirely your management.

I went through this for literally the last 4 years before I finally got fed up and quit and went to a startup for good. The issue is entirely your management. If your management doesn't respect and value you specially they will send signals to everyone else that you can be ignored. Like it or not, your peers entirely look to your management for who to respect and listen to and ignore. If your VP etc are not telling them: "This guy is the shit! So valuable" they will ignore you. Nothing you can say or do will fix it. No heroic acts or genius insights will work. Your peers are just drones that do what they are told. They will obey the signals being sent to them. If your management does not respect you and listen to you, no one is going to respect and listen to you. I had 10+ years of experience in a particular domain at a leading FAANG-like company. In fact, I was a leading expert. The VP of that group felt threatened by me and sent signals to stomp and ignore me. So guess what? That's what my peers did. I am sorry but nothing you can do will fix the above situation other than working for management who respect you. I left that situation and report directly to the CEO of my current company, who loves me. Furthermore: If you want to work with competent people, I have learned my lesson. Big companies are a complete waste of time. Everyone sucks, just does what they are told, there is no creativity and the talent level is low (as well as motivation level) even at the very top companies. What snapped me out of it was reading an article by a recruiter who flat said: "Big companies don't actually want talented people, because they just argue with management. They want people in the middle of the pack who generally obey orders." Will never go back to a large multi-thousand person company for the sake of my soul and sanity. Finally: All the signs you just outlined are signs of a company with way too many people who aren't being productive. That means arbitrary lay offs are coming.