My 10/11 month old slaps me and does the Mambo whole breastfeeding!

Does anyone else have a 10/11 month old that slaps them in the face? Or headbutts them in the face? And then thinks it's funny when you tell them no or hit their hand while saying no? Why are babies sooooo violent!? How do you get them to stop?!

Does anyone deal with their child doing the Mambo whole breastfeeding​? Or pulling the nipple with their mouth? Or it just hurt to nurse in general? Like, I can't tell if she's pressing down with her gums or using teeth!