They feel terrible!

I’m 39 years old and I’m determined to buy and be happy with my first pair of Doc Martens. This is my third pair (the other 2 didn’t fit properly so I returned them) and although these fit well…. They feel like pure shit while walking! I’m starting to wonder if they’re not even real ones. I bought them off Amazon. My question is, are these boots supposed to be very stiff? Like the tongue is even so stiff that as I’m walking it’s stabbing the tops of my feet. Please help!