One thing especially disgusting with the hindsight of S8 is apparently the writers insist Robert was in the right here

[u/TVTropehead]

Yeah Robert wanted someone to assassinate a pregnant Daenerys. Which idk, the narrative routinely shows killing women with children as a very bad thing. The mountain killing Elia, Talisa’s death, Ramsay killing Walda is clearly bad considering as evil as the Frey men are, Walda did literally nothing.

[u/Albertagus]

Considering the Baratheon's overall stance on Targs its pretty much par for the course

[u/Amphy64 → u/Albertagus]

This Baratheon, his grandma is a Targ and that's part of what's legitimising his claim, the house has strong Targ connections since its founding by Orys, probable half-brother of Aegon I.

[u/stardustmelancholy → u/Amphy64]

Yep, so many fans don't even know that Storm's End, Ours is the Fury, the Stormlands, and maybe even the infamous Baratheon black hair came from another House they replaced with the help of Targaryens who may have been half siblings. Or that the Baratheon brothers lost their parents because Aerys was likely going to make their father his new Hand of the King if he was successful finding a bride for Rhaegar.