The attempt at an international rules-based order has failed, the UN security council has become a joke, and each nation state can do as it sees fit as long as no other is willing go out and stop them.
That is in fact a return to the situation of 1800s,.I wouldn't say that's fine exactly, but it is not unusual, historically speaking.
Happened during the Cold War too mind you, Lumumba and UN secretary-general Dag Hammarskjöld for example, and more recently president Habyarimana in Ruanda.
It was imho. just in 1990s we believed something different was possible.