What criticisms of the team do you remember? The interview he gave was harmless enough, even funny at times and McCarthy blew it out of all proportion. They could have put it to bed over a cup of tea and moved on. Instead McCarthy tried to dress down his captain in front of the team. It was a really bizarre decision for me. Obviously stuff had been building and they don't seem to have ever seen eye to eye but again, it's one of the worst displays of man mgmt I can remember. If Keane hadn't been completely committed on the field it might be different but he was. Accusing him of faking injuries and calling him out in front of people like that was just the worst way to handle the situation.
You can read the interview here.
Nothing in there attacking the team at all. He mentions the bust up with Kelly that they were laughing about together afterwards. He mentions something Quinn said previously. Nothing else about any players or the team in general. Nothing even about McCarthy himself really. The FAI are the main target if anyone is. And the media over the coverage he got for missing Quinn's testimonial. McCarthy took it personally though which says more about McCarthy than Keane to me. Both flawed but one was there to manage, flaws and all.