I have never been to China, but to me it seems that with all their faults that ultimately Deng, Jiang and Hu wanted what was best for China.
But Xi seems to care about Xi.
But Xi seems to care about Xi.
I think people like that are the reasons why the world isn't at peace. China could've become the next japan. They could've probably overtaken the US that way too. But now, they've "alerted" the eagle, and the US will never let china become a superpower.
It already is. To the less degree than the US for now. Could go either way in the future. But if you think that the US could go on forever dictating what other countries allowed to do I think you are wrong.
Instead Jiang / Hu had their own agendas including moving vast amounts of capital outside and also for themselves e.g. some of the largest VCs there. Some of Xi's policies e.g. restricting movement of capital has to do with this.