It is refreshing to the leader of a country doing something insanely untoward, and then suffering the consequences for their actions.
Around the world, most of this stuff is dry runs for other stuff.
Whether you like Trump or not (I don't), Trump of 2016/2017 did not meet the threshold. (Half of America had just elected him, what would you expect?) I think Jan 6th clearly met the threshold, and Biden should have seen that Trump ends up in prison. He somehow didn't - I get that precedents are important in politics and America had never seen an ex-president in prison, so would have been very controversial - but I think it was a wrong decision and America is now paying the price.
By 2021 the Putin/MAGA forces had accreted so much power that it was safer for Republican senators to bend the knee and acquit in the impeachement trial.
The only way to win against the US is to divide it from within and/or obtain its non-involvement. By the time they send a carrier strike group, or worse, troops, it's game over. So that's what the Kremlin is doing: the thing that wouldn't have worked during the Cold War because the commie agitators would have either ended up in prison or being constantly harassed.
And what did he do? Almost immediately after becoming chief prosecutor, he starts hunting down Cho Kuk, his superior (minister of law) who Moon just appointed, and Cho's whole family members, in a blatantly motivated investigation. And also doing the same for Lee Jaemyung, the current opposition leader, who is now one supreme court verdict away from becoming ineligible for the next presidential election, for violating some election law.
(One can argue for days whether Cho and Lee did crimes, maybe they did some, but it's clear that if prosecutors were 10% as enthusiastic in investigating other politicians, half of the current legislative and executive branch would be out of jobs.)
...which gave him a gigantic publicity boost as "defender of law and order," but it was always built on hypocrisy and Korean prosecutors' ability to take care of their own first. We knew Yoon was a hypocrite, but nobody expected him to be crazy enough to start a coup. In one drunken decision Yoon apparently handed presidency to his archenemy Lee Jaemyung, who's also known for being rather divisive and not forgiving his enemies. Talk about karma.