This is of course only your side of the story but it sounds like he's way better at office politics and elbow tactics than you are. When you were at same level

This is of course only your side of the story but it sounds like he's way better at office politics and elbow tactics than you are. When you were at same level in the org I would have just cut him off from the critical information flow and communicate directly to the superiors. Now that he's your superior you cutting him off can backfire where you're the one causing the trouble and not being a "team player". Anyway, you can bet that he'll continue to take the credit of the work that his team will be doing, fast forward 10 years and he's probably a C level exec while you're still a SWE. Just the way the world works. My advice is to a) leave asap, b) simply ignore him as much as possible while you're stuck there.