I know what you mean, there's something about 10%+ that feels harder than it should relative to 7% or 8%. I'd suggest continuing with your 26T chainring but shift to smaller cogs in the rear for part of each climb. When you are comfortable using whatever combo equals your 36-34, then begin starting out in the 36 ring. You want to avoid a front shift while you are climbing a steep grade with low cadence.