he is not into football anymore. His head is 100% on his family.
remember how he celebrated goals in earlier years? he has reached everything bar the WC and he also knows he will not win it in his life.
the only reason he still scores that much is his incredible talent and vision, but I cant remember a single game in the last 3 years (since the cl final) where I saw the bullterrier messi.
I think he really doesnt care anymore, he knows he hasnt the teammates to win it all again. He just waits for the ball to be at his feet and then he does the magic, but his off the ball movement is non existent. People always tell that cr7 scores tap ins, yes he does but in 99% Messi wouldnt be in that positions to score those tap ins.
I wouldnt say that his legacy is ruined but it def. took a hard knock because of so many factors especially all barca cl exits plus all the final losses with the NT