You're supporting the point of the person you responded to.

One vote isn't enough. Just Obama was insufficient when congress was not sufficiently aligned.

That’s the separation of powers at work, which is desirable. Congress has to (and can) do it. Obama, unlike Trump, would sometimes back down when he met the edges of executive authority. That’s how it should be.

I wanted Gitmo closed, but I don’t want it closed in a way that further expands the executive branch by once again nibbling at the edges of another branch’s authority.

At ~all times for a long period of time during Gitmos operation, there was at least one (revolving) prisoner that no nation on earth would take. I think that was the biggest challenge for someone who actually wanted to close gitmo, to close it. Not clear where you would put them that wouldn't be yet another prison.

I guess now that the US has normalized relations with the Taliban, maybe they'll end up sending them to them, not sure who else will take the last ones.

No, they refuted their strawman.