Meredith can treat people like dogshit bc hey she has been through a lot but Maggie rightfully feeling betrayed by her sister, days after her mom died is too much for people.
Maggie was an awkward nerd, who constantly second guesses herself in her personal life, she confided in Meredith about her crush on Riggs in 12×24/13×01, she found out about Meredith and Riggs in 13×20, so Meredith hid her thing with Riggs for almost 6 months! And it was days after her mom's death, she blamed herself for pushing her mom to go for the extreme treatment, but God Forbid she calls out Meredith on her lying, right? Maggie was acting like a teenager and Meredith was mature? She went behind Maggie's back and asked Riggs to turn Maggie down for a date, instead of you know, talking to her.
This is what I don't like about this sub, people will villify characters like Derek, Owen, Maggie, Arizona, Bailey, Geroge and Izzie while loving Cristina, Amelia, Meredith, Alex, Mark, Callie, and Richard even though they have done the EXACT same things!!