He's playing 3D chess with Kirk, calls him Jim,
He's genuinely surprised when he loses.
He is not familiar with Earth emotions and he is not familiar with Kirk as a player.
He's familiar enough with Kirk to call him "Jim", but no one would watch that episode and conclude that they're bros.
has the guts to tell him to strand Mitchell. They were friends.
Dude, he's the XO and Mitchell is a threat not only to the ship but all sentient life he encounters. It's his job.
Finally, are we really going to apologize for nuTrek by attacking the earliest episodes of the original series?
Keep lowering the bar kids.