He got good results with those players during his first season, yes? Put some respect on his name. Erik Ten Hag is much different from Mauricio Pochetino, you don't have to compare them.
Also, I don't find what you wrote valid, We don't know what will happen with Enzo Marasca, I don't see Chelsea bringing in Pochetino when he's already left the club.
Manchester United was already strong before Ten Hag arrived, they were successful during Ten Hag's first season because Ten Hag haven't completely ruin the team, he only change a little bit. That's why as we can see the second season is worse than his first season, this season aka the third would be worse.
Of course we still don't know Chelsea's performance during Maresca become their manager, but I speculate it would be worse.
Here we go, first project by Maresca to build Leicester 2.0 in Chelsea. He signed Kiernan Dewsbury-Hall, an England player that never join in national team and only played in tier 2 teams except Leicester City. Next... Abdul Fatawu, Ricardo Pereira etc.
