Halilović makes things happen and constantly push opposition to defending position, instead of succumbing to pressure or passing simple ball like most alibi players do, if fans are mad doesnt mean they are right.
So frustrating to watch his second half, many times he doesnt use his energy when he has ball at his feet.
Think of Di Maria who grinds, bites and constantly tries.
Its being smart, he knows he cant be omnipresent at the field and conserves his energy for what hes good at. Running around like monkey would most likely be worse.
Alen is beautiful to watch at the pitch, and he adds value to the game even when hes not actually converting any chances or adding much to the winning of the game, he already has place on the pitch by that fact.