wondering if anyone has the 2.0, 4.0 or 5.0? have been having some concerns, questions about my 1-week old 2.0

One of the big concerns I have is when in a 39x28 climbing even a little 4.5% i have to put a ton of effort into turning over the pedals, when actually on my domane climbing the same hill that was mapped I can keep the cadence between 95-105.

Any thoughts.