Just, let it go already, Brian didn't see Frozen. It really wasn't on his radar when it came out in 2015 and then he held on to a sense of pride with not haven seen it. They all think that he won't hate it and that he will be softer on it they all were.  He agrees that he didn't hate it but that it wasn't as bad as he was led to believe it was going to be. After deconstructing the movie it becomes clear that many components of the movie are done very well, but it really only gets good at the very end.