Sanctions never work.
They're the answer to the question of, "How do we respond to something involving another country we're expected to respond to, without having to actually do anything meaningful?"
Even when the sanctions actually affect the country we're trying to punish, it often backfires. The affected country's leader simply blames the US for being evil and heartless, and the suffering citizens say to themselves, "Yup, our lives just got worse because the US put these sanctions on us", and most don't bother to think deeper than that. This just strengthens the resolve of the citizenry to support their shitty leadership even more.
Opposing leaders also feel out the mood/competence/attitude of the current US Administration, and adjust accordingly. Say what you will about Trump, but everything he did foreign policywise worked out. Sure, he pissed off a lot of leaders, including our so-called UN allies, but every move he made ended up being correct. That's why we didn't have foreign policy disasters under Trump, yet we've already got plenty under Biden. The peak of Trump's Presidency came in early January 2021, after killing Soleimani. The left tried to build a narrative that this would start an endless war with Iran. It didn't. Iran came back with a purposefully weak and symbolic response, and then backed away. Once again, Trump made the right foreign policy move, despite defying the "experts' saying otherwise. The economy was booming. Reelection looked very likely. Then came a certain virus, and everything fell apart for him.
Bottom line is that it's no coicnidence that so many foreign leaders are getting uppity with Biden. He's seen as an old, senile fool they can walk all over, and they're doing so. Trump they always saw as a little bit crazy to the point where he might fuck back with them, so they acted accordingly.