It's very easy to look only at one facet of a game and say what you would do to improve it, then say the coach must be an idiot. You're not being tasked with every facet of the game, the franchise and whatever his personal life entails. You also don't know what his goals are. If you think a team is trying to win a ring every single year, you're missing something. A coach does what he can with what he has, and any other coach in the NBA wouldn't even make the playoffs with this roster. No way this bench in any other city does anything close to what they do in SA. Danny Green couldn't get playing time in Cleveland. George Hill still cannot get much in Indiana (and he sucks there as well, a testament to how they use him). Who the is Gary Neal? I don't know, but other teams in the league sure as know who he is now, and if we dumped him they would pick him up. James Anderson even found a job.
Say what you like about Pop, his last two rings were without overwhelming talent, just solid basketball. Duncan is good but he's not going to win on a team with a couple of mid to upper level players and a roster filled with foreign players, D leaguers and some washed up, about to retire sub stars.
You really have no clue about coaching if you think Pop is overrated.
The Lakers would sacrifice Kareem mid court on Christmas day to get Pop.