The US has been the only ones playing world Police since the fall of the Berlin wall. The rest of the world was happy to let them do so.
Undoubtedly most countries in the West haven't taken defense seriously but that's because they were stupid enough to think the end of the Cold War meant world peace.
Don't kid yourself into think the US has been the only good guy on the planet protecting everyone.
It's clear now (thanks to Doge) that the US has been the leader of instability in the world trying to reorganize it in their favour, including in Ukraine.
You might not like it, support it, or voted for it but that doesn't make it false.
It's clear the wars and meddling of the 90s and 2000s have made the world increasingly unstable.
The UK and other countries have played their role too, but the US has been the leader.