Everyone is entitled to their opinion but judging Mike Kelly on this year is not ideal, and not really fair. As with all teams, there are so many factors to how their season has played out but for Phoenix the below have been huge contributors (mainly negative):
PLAYER AVAILABILITY -
Mitch Creek - 23 of 28 games
Gary Brown - 20 of 28 games
Alan Williams + Tyler Cook - 18 of 28 games
Will Cummings + Abdel Nader - 20 of 28 games
Craig Moller - 12 of 28 games
So just looking at the projected starting five, they have missed a combined approx 47 games (give or take with injury replacements etc). Then if you take into the account games where 3 imports + Creek + Moller were missing that is probably at least 4 or more???
Then they miss playoffs by 3 or 4 games. Massive impact and largely out of the control of Mike Kelly. (other teams like NZ and MU also had injuries but not to this scale).
ROSTER MAKEUP -
With Mike coming into the club after some of the roster has already been signed, this would have been difficult to manage.
Having 4 guards Six Foot or under (Brown, Cummings, Ayre, Foxwell) was always difficult to understand and in hindsight was not the best approach. Brown was bad signing with his injury history, Cummings set up to fail as didn't have ball enough for what he needed and on D would be on bigger player, Ayre got his role confused and thought he was one of primary options, Foxwell regressed because no opportunity.
Then I believe Vague and Reuben signed also before Mike.
Then signing Brown who has history of injuries, Nader coming off 2 year rehab, Moller coming off rehab and major injury, Williams being banged up last season, and Creek an injury risk because of workload, there was always a risk of missing priority players for big periods.
The above is largely out of Mike Kelly control and is most likely the responsibility/accountability of Management and Owners.
Kelly may not end up having a long and successful career at Phoenix but judging him on this year would be a mistake.