All of which indicates that the US's words are worth shit, their promises is as empty as their rhetoric and their threats are puny.

If Russia actually helps stabilise Syria by getting a deal done between fractions then their standing goes up. Biden isn't focused on 'ending sandbox wars', it's because they found a better way to launder money through Ukraine than the Middle East, only reason they changed. By the end of his term, the US will be mostly a joke because of leadership so we can only hope China's decline pushes a Taiwan invasion attempt off the table.