Game of Thrones is known for being a shocking, bloody, and scandalous television show. However, it gets a lot of pushback for also being weirdly indifferent about many of its own worst transgressions. Admittedly, the show takes place in a different time (sort of) and the showrunners can get away with a lot in the name of "historical accuracy." Game of Thrones is a fantasy series, but it takes place in a medieval Europe-esque world, and medieval Europe was a pretty harsh place.
On the other hand, there are a lot of reasons why the show might handle certain sensitive subjects sloppily. Overeagerness to shock is one reason, but every episode also includes tons of important plot points from the books being shoehorned into a very limited amount of time. It's natural that certain details would get lost in the shuffle, but that doesn't necessarily excuse the blasé attitude the series often takes with shocking incidents.
What are the worst instances of really horrible stuff getting downplayed on Game of Thrones?
It's bad enough to have your home seized by outsiders and then get beheaded for refusing to swear fealty to your new overlords, but Theon's ineptitude with a sword made Roderick Cassel's execution even more terrible than it had to be - his neck was basically hacked apart by three or four separate misplaced blows, then snapped in half with the help of Theon's boot heel.
Lots of fans were angry and upset over this scene, but within the universe of the show, its weirdness and inappropriateness was never fully acknowledged by anyone. Some people, including the showrunners, even tried to claim that the interaction was consensual, since after telling Jaime "No" several times, Cersei eventually just gave up and let him do what he wanted.
Tyrion doesn't have the best relationship with his father, and after he meets Shae and they start getting to know each other, it becomes pretty apparent why not. Many years before, already ashamed of Tyrion's deformity, Tywin rubbed in his paternal rejection even deeper after Tyrion married a common woman, Tysha, whom he had met and fallen in love with.
Supposedly, Tysha was actually hired by Jaime to take Tyrion's virginity, which made Tywin even more disgruntled about how the whole thing ultimately went down. To punish Tyrion for his rebelliousness, Tywin paid Tysha to service every member of the King's Guard while Tyrion watched.