The cause of the extinction of megafauna in NA is actually quite debated, and while humans likely played a part it’s also likely that changing climates played a major part in their extinction as well. I may or may not have just had an Archaeology exam recently. This definitely does apply to bison though.
Jingle Bells, Batman sme... (i.postimg.cc)
Pleistocene Crash Course (mander.xyz)