Macaque did not train anyone.
He trained MK for a period of time, but that was an entire plot to steal Sun Wukong's powers (which he failed IMMENSELY at regardless...), so that one occurence didn't count to him. A one-time incident.
And he almost vowed to never do it again. He'd find some other way to kick Wukong's ass.
Keyword; almost.
When he found you, you were heaving, sobbing, unable to control the amount of power your body was exuding. You lashed at him, attempting to get him to leave.
And he saw that raw, pure, unadultered fear in your eyes. Saw the way your hands shook, the tears falling down your face in your panic.
And Macaque approached.
With a calm hand, he pushed past, settling a hand on your shoulder, and getting you to pause, to breathe. To think for a second, to calm the power exuded from your being.
He sat there until you finally stopped, too exhausted to stand, almost immediately conking out once your body could no longer manage it.
Macaque definitely did not spend the next few hours situating you comfortably, and heading downtown to pick up some food and water, returning to you and wating for you to wake up.
...okay, he was lying.
...moving on.
Now, he tells himself; 'It's for the safety of others', or; 'I'm doing this for them', and even; 'I'm not getting attached'.
Which was a bold faced lie.
Macaque was, very much so, growing attached to this kid.
The raw determination you had to get it under control. The way you worked to manage your abilities, too become a force even the strongest storms would bow to.
And then the moments where it got too much, where you collapsed and heaved and shook with sobs beyond your control. Where he'd sit beside you, a hand on your back as he comforted you.
...Macaque was not getting attached.