You don't get it. Of course stuff breaks. That is not the issue.
The issue is to find out why, fix the root causes (usually more than 1 or 2), and improve. Because its not supposed to break, is it.
But to cover it up and sweep it under the carpet because 'stuff like this happens everywhere even in Europe so stop asking questions' is just plain ignorant. And scary. And potentially symptomatic of deeper problems. (And don't try to tell me a sudden complete failure of radar and ATC electronic systems isn't dangerous.)
It needs to be properly examined by independent experts. Even if one of the root causes was someone screwing up, someone who happens to be related to the person in charge of the investigation, for example. Or even if another root cause is that, while systemic vulnerabilities in the design and operation of the ATC system had already been identified in a report, that nothing significant had been actioned to address the recommendations of the report by those responsible for the system.