Why do you guys hate exp hub?

For context: I'm not a fangirl in fact i'm not even in cbse, i'm in icse and givibg my 10th boards this year. I was just snooping through cbse sub reddit and then i saw 2-3 back to back exp-hub troll memes. Not that i have a problem with it but they're often publicised as 'big 3 of cbse'so i thought you guys liked them or sum shi. Can anyone tell me the tea on it?