He does is quite often, especially when he lost motivation. I remember a WC game from Argentina vs Iceland, he absolutely didn’t care and walked practically the whole game.
I always liked Ronaldo more, even though there was no denial that Messi was/is a absolute beast and almost unstoppable when in form, Messi though is a real pussy with a shit mentality who doesn’t care. Compare him to Ronaldo who did everything to at least get a goal against that amateurs yesterday. What a difference.