It's not possible because Messi's lack of effort and involvement, and his protected place in the team (the man that has to be passed to all the time, doesn't defend, can't be rested, can't be subbed, is old and earns 100m a year with taxes) can only be justified and compensated by him playing great football and having decisive contributions consistently. Meaning difference-maker, leading goal-scorer, leading assist maker, and so on.
Then the ones who dislike Messi's attitude and his dictatorial, unpleasant style, will have nothing to bash him with, in football terms. Because he simply delivers the good. As long as you deliver the goods, exceptions will be made for you. It happens in every domain of life.
The problem is Messi doesn't deliver the goods anymore and is miles from the level he needs to perform at, for the club to still tolerate and protect his special status. Didn't do it in CL except rarely in the last years, and now he seems past it in La Liga as well. With bad performances and terrible numbers. And not only against the top sides in the league but also against weak bottom-table teams.