I think you may have misunderstood like 7 key points in the show - he was never supposed to be captain America. Sam donated the shield (now HIS shield/mantel) to the museum but the gov intervened - he clout-chased (the interview at his HS) - he disrespected Sam/bucky’s experience as heros and Steve’s partners/friends - he took the serum even after talking about it with Lamar/throwing shade at Bucky the whole time - dick to the Dora (“they weren’t even super soldiers” like tf??)
- the guy he killed DIDN’T kill Lamar, but even if he did, it would still have been completely unlawful for him to have done that - he then lies to Lamar’s family so he doesn’t have to do something hard - doesn’t listen to reason with Sam/bucky - doesn’t take responsibility for his actions (“you made me”) - even after being fired, he STILL tries to be Captain America, which puts him at risk of going to jail forever (the brig) and where would that leave his wife? Selfish af