Both the French league and Italian leagues have twelve teams who would struggle in championship. I have lost all respect for Messi
Ultimately though, history won't show that he played in a league a bunch of people considered inferior. It will show goals and trophies, and records set. In one of the top European teams.
And at PSG he will get plenty of goals, and is almost guaranteed trophies. While being paid well, preparing for the world cup, playing in the CL.
Supposedly medical today so we should be expecting the 'arrived in Paris' news breaking soon enough.