Don't see an issue with Lamal himself. He was poor, but then look at Lewandowski, Rafinha and Ferran these last games.
The problem is that when you have an 16 year old player breaking through or given starts in the offence, he has to be the third wheel of the trio and given room to play, not thrust to the first wheel because the rest of the attack is not performing.
Messi had Eto'o and Ronaldinho in front of him. Even Ansu had Messi and Suarez. Meanwhile Lamine is the youngest of the bunch and he has... nothing. Not even a midfield behind him given Pedri's and Frenkie's injuries.