Technically yes but not really.
Mcenroe was harsh on him, because this was a time when he clearly showed he does care. He didn't want to give up and retire that's why he kept playing on as long as he did and why he was in tears. The wrong time to beat him with that stick.
Kind of a stupid question. Are you in work at the moment? Do you love your job? Wy would he still play? I don't know probably something to do with the millions he can make by not training that much and keeping doing what he does, staying in the top 20 why would you not do that even if you didn't like it that much. He's not alone, we like the idea of the sportspeople we enjoy watching to really love the sport, but it's hardly unique to Krygios to not.
He has quite a bit of time, especially in the days when people seem to be able to go on for longer as they do. He's 21 and he's number 15 in the world. The sooner he can sort himself the better but it isn't going to happen because John Mcenroe being a loudmouth in his bid for attention so joins the Krygios bashing train, it'll happen when he realises himself, talking to family or friends and coaching and realising what he can do if he can apply himself more.
Don't really like it that much is what he says. That doesn't mean dislike. For example, I don't like baked potatos that much, they're ok, quite nice, but I don't love them. Doesn't mean I hate baked potatos.
Regardless though, even if he does hate it, we shouldn't care. Probably plenty of tennis players are in similar situations, many other sports-people across other sports will be the same. Maybe you could say he probably shouldn't keep talking about it, reality is though now that he's said those things he probably gets asked about it when journalists talk to him, having heard about this. Should he then lie and say 'yeah I love tennis actually, changed my mind, best thing ever'. Or maybe just run off so they can't get a quote.