Well here's one thing, Vasco fans are absolutely livid they sold Douglas Luiz for that price. A couple even mentioned that he is their best player at the age of 19.
here's some of the comments from the Reddit thread, from their actual fans who watch the matches and not just the youtube compilations:
Our fucking president, never know how to value and sell, same old piece of shit that sold Coutinho for 3,5M of DOLLARS
fuck off, Douglas, with the football he's playing right now, is worth way more 12,
12M would you pay for him if he was still in under 20 or some shit, not playing high level in Serie A
FUCK EURICO, another promising player we lose for way below his value. First Coutinho, then Alex Teixeira, now Douglas
For the City fans, he's only turned 19 and has been our best player for almost a year. He's a really promising box-to-box midfielder, with good passing, very technical and who can score goals. He's still kinda raw but might become great for you if developed properly. Guess now I'll bcome a citizen, you guys now have my two favorite players, him and Gabriel Jesus
Never hated city more in my life
In some years, City Fans will look to Douglas Luiz and will think how Liverpool Fans look to Coutinho now and think "omg, how we bought this player so cheap?"
Trust me.