Stand-in United captain Fernandes admitted his side's fans were within their rights to shout out the 'you're not fit to wear the shirt' chant.
"What we did, what I did, was not enough to be in a Manchester United shirt and I accept it," said Fernandes.
"They outplayed us, they always had a solution, pressed us better and deserved the result.
"A little bit of everything [went wrong]. Quality. Mentality. They deserved to win and we deserve to be in the position we are in now.
"It's something we have to look at and be embarrassed about because that was not good enough from us and we have to do much better.
"I signed my contract because I think the future can be good, but obviously many things need to be fixed, as we have seen this season."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!