Durant is one of the best shooters I've ever seen. But his ring count is below a lot of superstars. He only won championships with Warriors, if he had it with Thunder that would look different. Every player has had mistakes and bad memories in their career. It's not uncommon for Durant to go to the Warriors for the ring. Other superstars have done that, and they didn't even get the ring (Remember Karl Malone and Gary Payton in Lakers) in the end. LeBron's announcement of his new team on the TV show is also a bad memory, but when LeBron is mentioned now people don't think of that time.
Some players are not skilled enough to bring their team to the finals without having multiple help from their teammates and that's exactly what we have seen with Embiid because he has been playing in the NBA playoffs in the last few years but his luck is no different than the last time when they always knockoff and can't get to the NBA finals for even one time. KD was different because they were able to play in the NBA finals with WB and others but instead of further improving the team to win it next time, he decided to get off and go to a superteam which doesn't really need him to win the championship but no questions when he gets there, that's exactly the year they need him to win those hard games.