The Champions League can't just depend on one player. even though messi is a sensational player but depending on Messi in the Champions League and blaming him when he fails is a condition that is quite childish I think.
This requires team harmony and not just an individual thing when it comes to bigger competitions.
Champions league is a tough competition, PSG are still yet to possess the qualities needed before they can emerge winner for the trophy. Leo Messi is big name in football and his presence on the pitch frightened his opponents, he's always one step ahead of everyone on the pitch. Pouring blames on Leo Messi whenever the Parisians get eliminated from the champions league is probably not a good idea, he's not the only player on the pitch, besides he's frontline and what happens to the defendlines? They're the ones to be blamed to defend poorly against their opponents, leading to their exits from UCL.