Just let the man prove his worth this upcoming season because we saw that he was clearly struggling and he is not averaging the same figures that he did a few years back but there's a reason for that, as we know, the NBA changed some rules so that Harden cannot have many free throws he wanted because he's using fouls to make free points unguarded.
Anyway, let's see what is the improvement of the 76ers this time.
Harden is the type of player that never won and played very well, and there are many like that. The most famous one is Utah Jazz back in the day with Stockton and Malone, they never won a ring, hell even when Malone went to three-peat Lakers just to win a ring, they still ended up losing that year.
All in all, I have to say that the best thing Harden could do is put his head down and keep working hard, if you keep doing that then you would end up winning something, it doesn't require more than that, because all other parts are out of your hands. You can't just hope for the team to get another supterstar all day, it is not up to you, it's based on the teams management and Harden can't do anything about it.