Read description first Talking to Yunobo to find out more about Daruk. Also checking his diar- I mean, TRAINING JOURNAL. These are unlocked after starting Daruk's quest. Watch, enjoy, and comment, everyone.
Daruk gets overlooked so often, but I find his friendship with Link to be so genuinely touching. Out of all the Champions, it's Daruk and Mipha who were closest to Link, and who had known him the longest. There was genuine admiration, trust and respect there. And clearly, Link trusted Daruk with a lot of things too - how else would Daruk know about Link's "troubles", or the fact that he finally talked about them with Zelda? The only explanation is that Link talked about them with Daruk too, to the point where Daruk already knew all about them by the time Link opened up to Zelda about them. Makes sense, given the fact that Link knew Daruk for much longer than he knew Zelda. Link and Daruk were clearly very close. :') I wish we'd gotten to see more of their friendship in-game.
I'm pretty sure it was because he actually ate rock(like "what the heck did i just did"type of speechless) rather than enjoying it,y'know? I believe it's not because he loves it lol. Daruk just misunderstands it😂