Have you played against Senna

Hello I made many games, I encountered a lot of Senna, her damages seem OK, nevertheless her escape looks ridiculous to me. She can travel half of the bot lane like this. Like she can move half of the bot lane with that. I don't understand such an ability for a support/adc that has so much harass. Edit : And FOR ALL THE LOVE OF GO%, why riot does allow brand new champ to be in ranked, we already have yasuo to ban.
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