DA supporters always excuse their incompetence by saying they did not have majority in the metros they governed after 2016, but they are never going to get a majority soon, which means they have no business wanting to govern anywhere in a coalition.
Whilst NMB and Joburg could be explained since the governments there were unstable, they had a full uninterrupted 8 years in Tshwane to show everyone their famed good governance, they failed in a manner that no government of Tshwane has ever failed before.