Honestly, he needs time out of the team in my view. He probably also needs to have the captaincy taken off him. I don't think the armband is doing him any favours right now.
To me, it's pretty obvious the guy is completely bereft of confidence. He's been absolutely shite this season but he was equally really good throughout most of last season, despite the rocky start. Quite a few knowledgeable people were even making a case that he was one of the five highest performing centre backs in the league. He has gone from that to being completely godawful, which to me is due to a combination of the system around him falling apart (basically everyone has also been terrible this season) and his confidence being through the floor.
Now, I'm sure I'll get slated for being "deluded" on here by people who have always thought Maguire was crap, but to my mind this has probably come about because of the immense levels of pressure placed on him by two factors that were ultimately out of his control: the ridiculous, world-record setting price tag and the decision to make him captain after just six months at the club. This is all a very heavy load for somebody who had previously just been Leicester City's primary centre-half to handle, and this is especially true now that some fans are essentially holding him solely accountable for the mess we're in right now because he's the captain (this is entirely unfair, by the way).
To summarise what I've just said, I'd say it's pretty damn clear that Maguire's stress levels are through the roof. The guy was a good defender bought in at an absolutely insane fee to be the saviour of our crumbling defence and then to top it off he was also prematurely handed the captaincy of one of the most high-pressure football clubs in the world. Even in some of the actions that have made him look a bit of a tit recently, like the interview or the ear-cupping, I think it's clear to see that this is a guy desperately trying to convince himself that he can handle the pressure. We can't go back on the transfer fee now, but I do think it'd be beneficial for all parties if we gave the armband to someone more suited to the pressure that comes with it (Ronaldo is probably the best candidate) and took Maguire out of the firing line for a while.