It's a reasonable response to Twitter's issues because of Musk publicising that he was going to clear out Twitter's bloated architecture. If you take responsibility for an architecture it's ok to be criticised if things go wrong.
As if performance issues at launch time were comparable to a 17-year old service that started having issues after his new CEO decided to fire 80% of the staff…
It's normal to happen during extreme growth of several millions per hour. Less normal to suddenly happen to a functioning website post-organic growth for a decade.
I say this sarcastically because that was the narrative whenever Twitter has had load issues.