I dont need to research, I know Daks brother committed suicide, and Im also aware skip talked about it, but Im gonna do as you suggest, and Im gonna go find the clip when he discussed it, and Ill bet you he didnt say he was "Weak," in the context that you just did. Just like in his book he didnt say Aikman was gay, but people cant read fine details and they twist things to make it be what they want it to be.
But I will ask again, what is the difference between MENTAL ILLNESS and stress. Does Dak have a mental illness? Or was Dak dealing with some serious grief over his brother? My wife's dad passed away unexpectantly 2 years ago. It crushed her and she still deals with it today. Thats called GRIEF, thats life. She took a bit of time off of work and then life continues. She still had to be a wife, a mother, and has serious responsibilities at work that she DEALS WITH. Not unlike millions of other people. What she doesnt say is that she suffers from mental illness to get out of being the responsible person that she is.
Dak may still struggle with his brothers death, he may for the rest of his life. But that is not a mental illness, at least not by my definition. It is grief. But in our world today, we like to excuse lack of responsibility as mental illness because of day to day living. Every time some schmuck celebrity does or says something that gets the cancel culture up in arms they apologize and then say they realize they have issues in their past that they need to deal with to be a "Better person." blah blah blah... its just those are get out of jail free cards in todays world.