Baby won’t stop crying in car seat/stroller

I’m a first time mom and my 7 month old absolutely HATES her car seat and stroller. She screams and cries the entire time she’s in it. We swapped our Doona for the Graco Extend2Fit car seat and we tried an umbrella stroller from Amazon but still no luck. We are thinking about trying a pull wagon for our walks. Any tips would be greatly appreciated!!