Eric Trump has convinced himself that there is a conspiracy to promote liberals and the "deep state" on social media, and he's trying to get to the bottom of it. This includes, for whatever reason, attacking Ellen DeGeneres.
Twitter has a function called "who to follow", which Eric has been following closely on social media. He first found Rachel Maddow, but they also recommended that he follows Ellen! Oh no!
Ellen is not a politician, and Twitter sort of has this thing called 'algorithm' where it helps with suggesting who to follow based on people you click on. So whereas he could be upset over liberals in the government like Kamala Harris and such, maybe don't be mad that the platform is suggesting a friendly talk show host to follow. Or, you know, just don't click on their stuff so much.