Same when he moved to Sixers, no issues whatsoever with him and Joel Embiid. So not sure what you mean by attitude because it seems that he has matured already and knows where to have that "good attitude" inserted. And he didn't destroy the good chemistry in Sixers, it's that he was not a perfect fit, that's the way I look at it and that's why they have given him up and Lakers pick him up again to play last season. But right now, no teams are interested on his service.
The preseason is in full swing, and I think it's too early to say that no team is interested in Howard. I won't comment on his negative impact on team chemistry, but it seems to me he could still be useful on the court as a bench player. In addition, signing Howard wouldn't be a costly deal for the management of any team as he would most likely agree to even the minimum salary.
Well we are all talking about the list that @danherbias07 has posted and so far there is no team that an interest. If you haven't seen the list here it is:
10 of the top remaining NBA unrestricted free agents, including Carmelo Anthony and DeMarcus Cousins
1. Montrezl Harrell
2. Carmelo Anthony
3. Eric Bledsoe
4. DeMarcus Cousins
5. Avery Bradley
6. LaMarcus Aldridge
7. Dennis Schroder
8. Isaiah Thomas
9. Lou Williams
10. Dwight Howard
And unless we have a official announcement from team that will get him, we can say that even if we are in pre-season and in full swing, those in the list are not going to get any team. But as we have also been discussing, he can still rebound, defend, block shots and even score if needed. So he can be of used by teams needed a big and experience big man.