I don't so much have a problem that there WAS suicide in the game but more in how awfully it was written (a cheap plot twist so she could guilt her fans into reverse-review bombing her game.) If she couldn't write about such a sensitive topic respectfully and with some actual tact, it should never have been included.
I mean, obviously she can write whatever she wants, but she shouldn't be shocked when people, particularly those who have been actually impacted by suicide in some way, criticize her for it.
Edit: Also, from what I understand, the content warnings were only added to the game AFTER people complained.