I don't think anyone is blaming him for that. Like Albo stated, he's being blamed for being an unprofessional fat fuck who earns millions. Sure, you can be emotional, but be a pro FFS! You're getting paid millions to eat right, stay in shape, and give a fuck.
I never thought he was worth 90 million, and I consider it a bad investment, and his failings over the past couple of seasons only serve to validate that. Sure, he gave us a good run of games, but nothing to justify that 90 million outlay (which again I understand isn't his fault, but that's what we paid, and that's what he's going to be judged on).
Just like Turdeski (40 million down the drain - we paid the same amount for Dybala and the difference is night and day) and Costa (close to 50 million and terminally injured). Fans have expectations, more so when the club wastes invaluable funds on bringing certain players in.
Someone else posted,
@Xperd I believe, in the mercato thread that those three aforementioned players cost us almost 180 million Euros in transfer fees alone. That's a huge waste of funds in my book.