Hello there~ Happy new year to you too ^^
It seems like you understood everything pretty well EXCEPT for the fact that you are not reading the graph as intended to.
(and this happens because students tend to look at it subjectively)
If you look at subject 1 of the graph,
you can see that self-esteem is well below academic success.
(I know that right now to you, it seems that self-esteem and academic success are close to being equal, but that is not what the graph "intends to" show. Just compare subject 1 to subject 2,4,5 and you can see the difference)
So Baumeister's argument that academic success leads to self-esteem IS NOT well reflected through subject 1.