You should be measuring actual things. For Tesla, this means car sales and operational costs. For Twitter, it's still too early to see if Elon can make it profitable.
Now, for sure, some moves were really dumb mistakes, like suspending people for advertising their Mastodon profiles.
But remember, Musk said early that in the coming months Twitter will do a lot of stupid things. He knew ahead of time that he's screw up on some decisions. This should be familiar to anyone who remotely has any interest in the startup/entrepreneurship world. Try many things, correct the mistakes, double down on the good things.
If you see any highly skilled programmer doing live programming, they will do some obvious mistakes on stream. If you conclude from this that they are stupid, it's only because you have no idea how programming is done.