Are reality TV shows a good source of entertainment?

I agree with you. We can define News as reality shows. For debating reasons I didn't do this because my opponent may refute that news aren't reality shows, so I used one of her examples to answer.

HGTV has it's share of scandals.
TMZ is just gossip why do we want gossip.
Catfish: the TV Show is perfectly fine but afterwards I end up hating humanity.
Paranormal reality is probably fake if not they should consult a priest instead of doing it themselves.
Animal planet and Nat Geo is actual reality.
Science channel is also reality.

No because Jay Leno's Garage he drives on closed road without permission.
Moonshiner's they illegally make alcohol.
Naked and Afraid they are literally naked. Why do we get pleasure from their suffering? And why do we not like it when they tap out they tried their best.

Why is the opponent not responding?

Well, if you mean good by a godly standard, then no. If you mean good by acceptable or reliable, that depends on the person and how they are entertained. This isnt a debate, more so a discussion unless you and other person define what "Good" is and that isnt based on how people feel about it.

Define reality show. Well, Mythbusters and Top Gear are also reality shows, as well as Dr. Phil. Your two examples are simply trash ones and outdated ones in the bucket. I think Top Gear is a LOOOOOOOOOOOOT better than Kardashians.

...and what ain't reality tv when Trump preempts the news every night with a string of self-serving mumbles punctuated by frequent frantic fact checks?

Thank you for your question.
I was intending to use the term 'brain rot' as a more approachable term to others, not for informal reasons. Of course, we cannot measure 'brain rot', but instead we can use surveys and evidence to debate whether reality TV shows are a good source of entertainment.

While brain rot is certainly a hyperbole, what metrics define entertainment as good or bad?