That game stung and Hayward sucked it up that game. He played some decent defense but that doesnt cover up his bad shooting and his struggles. Hayward is not an elite player that can take games over by himself with any consistency. People need to stop expecting that. What he is is a really good all around player that is a borderline all-star. He needs decent players around him to help him out and alleviate pressure. When Hill, Favors, Hood, Burks are all out and other players are having bad nights it is unlikely Hayward is going to get many good looks or much rhythm.
That said all players have games they "disappear" in. Those games are usually when they get focused more from the other team. Harden, Curry, Durant, MJ all have had bad games, Hayward might have a few more but he is not on their levels offensively.