I think Embiid is happy about how the team is going but he is not happy about how much credit he is getting. I think the sensitive part about this situation is that we really do not know who is the "leader" of sixers, it is not easy to become a leader at their young age, usually leaders are 30+ year old super stars (or close age) and I feel like for a young team like sixers there must be some tension about who is leading the locker room.

Now Embiid is a jokester and a funny guy, so I doubt a team filled with older players (usually) would really see him as a leader at all, however Ben Simmons even though young looks a bit more calm headed and that is why I think there could be some clash between them about that spot.

Plus, contrary to what others think I find Ben Simmons not "that" good, everyone acts like a super star but I think he is just a "good" player at max all-star level but not super star level.