He didn't get a choice, Nakia died. And he had his full memories back before he made it home. We're not blaming him for what he did without his memories. We are saying that Storm offered him to another women when she can't be there and as "jwatson" would say, she did it because she saw his a a weak man. Which is full on what Coates has been pushing about men since his first issue.
If Storm thought there was something Tchalla needed to work out emotionally, she would have told him that she was going to return to Krakoa and he should come to her when his mind is made. But then Coates would have been lost on how to move the plot and giveWakanda Prime a chance to win without her there. lol