>>536045642
If people would play her as an Enchanter because it does very similar damage to the AD build and is so much more useful, Senna wouldn't be a "grief pick." But for some reason people think that because Riot keeps nerfing her AP build that it's useless, when it's been her strongest and highest win rate build since they've enabled it last year for every single patch since then.
She's genuinely a very hard champion to pilot, and I think she doesn't bring in the right players for her, which is why you probably think that she's useless early game too. Before 20 Stacks she's barely a champion, and it's easy to really punish her before then. After 40 she's starting to get annoying, and any after that is just a bonus.