He didn't teach yoda, he just chatted with him a bit and told him to go to Degobah to learn from the Jedi priestess.

Qui-Gon never completed his force spirit training, so I imagine it was quite difficult for him to communicate with Yoda in the first place, and he was meditating in a jedi temple at the time.

Oh and it was like the tail end of the clone wars by the time that happened, so I imagine Yoda was a bit pre-occupied before teaching Obi-Wan and by then there weren't really many Jedi to teach.

Anakin gets a pass for being the chosen one, and then for his redemption arc/self sacrifice...and I guess that gets inherited by Luke and Leah?

Hell Leah is like a masterclass in retcon and deus ex machina in and of herself.