Given its flaws, should the IPCC be disbanded? That would be pointless. Climate change is a problem of the future. Climate policy responds to forecasts of the future rather than measurements of the past.
There are large climate bureaucracies around the world, who exist by virtue of climate science. If you abolish the IPCC, the climatocracy will create a new IPCC. The IPCC should therefore be reformed.
Here are some suggestions:
Away with the infrequent, massive set pieces. Away with alarmism – that has been tried for 25 years, with no discernible impact on emissions. Away with activists posing as scientists. Away with the freshman mistakes.
Just good, sober, solid science. Let the chips fall where they may.