I have the same problem my daughter she's 5 weeks. Sometimes boppy helps. But I just try to do the tummy time a few more times throughout the day. I lay on the floor next to her and encourage her. I figure as she gets older and more into toys she will stay on her tummy longer. I also do tummy time on mommy while laying in bed or on the floor and sometimes she'll do more then a minute or two.
My daughter did the same thing. Try to do it when she/he is in a good mood and before you feed her/him. If the baby has a full tummy it might be uncomfortable. But in time it gets better, my daughter hated being on her tummy but now that she can roll over she is a little bit happier with being on her tummy. She is now 4 months
my son hated it too unless I was on my back on the floor and he was on his tummy. He din't like to scoot or crawl either and he was walking by 9 months. so Don't worry too much all babies are different and just keep trying :)