What is the problem that the sender of the following message is talking about?

"Ok, actually I DO have another thing I want to mention: between 12:40 and 13:00 you throw a lot of shade at fit.
First of all: I don't like fit, I don't watch his videos and I think he is an absolutely untrustworthy source.
However the section I mentioned might seem a teeny tiny bit too arrogant from your end. I totally understand your frustration with fit because I feel the same but I think the statements you make there don't help you or your video or your channel in any way. They just make you seem cocky. I am not saying that they will be necessarily damaging for your brand but if there is a way to remove them without destroying the whole video I would recommend you to remove them." Please answer in JSON format.
user