You are certainly not the first or last, but I would like to ask why? Solely based upon record? Or you feel Ayton is misused? I can't think of another situation of a rookie head coach with such a young and G-league-filled roster to compare it with, but it has gone about as expected I would think. I also think the "misuse" of Ayton has more to do with Ayton than the coaching staff so far, based upon my observations and quotes from everyone involved.
I think people want to blame someone and the coach is the obvious easy choice.
Bottom line is that there is no chance in hell that Igor is a bad coach. From Serbia, to Georgia, and Slovenia, he is considered an outstanding coach in Europe. In the states, he has been highly regarded everywhere he's coached- Clippers, Detroit, Phoenix, Utah, etc. I am going to assume that Alvin Gentry, Larry Brown, and Quinn Snyder are better judges of coaching abilities than a few malcontent fans on a Phoenix Suns message board.
I think that one of the problems is that Igor is very methodical and not reactionary. Casual fans (myself included) sometimes like reactionary. Igor started the season trying to see what he has with the veterans. Theoretically, Ariza, Anderson, and Canaan should have been better than a bunch of rookies. Without looking it up, there is 30 seasons of NBA experience between them. He stuck with the vets for a few games and then started making adjustments, one by one.
Igor will be fine. My guess is that an experienced, calm, methodical coach is exactly what a young team like Phoenix needs. Fans want someone who will get angry, someone who will yell, and scream, but anyone who's ever been in a leadership position knows that anger, yelling, and screaming rarely works. That's a tactic for some very rare instances in which it is helpful only because it shows the contrast with the "usual" approach. "Calm" is not "weak". You will notice that when Bridges got frustrated, Igor didn't let him just go to the bench. Igor was going to coach him (like he coaches everyone when they go to the bench) no matter what.
Igor knows what he is doing. He just has a team full of new players and rookies that lacks NBA talent. It will take a while for everything to get worked out, and I suspect fans will be calling for Igor to be fired after every couple of losses. That's a distraction. Outside of a few random games since the awful start, the Suns haven't looked like a joke, with the exception of those first two games without Booker and Warren.