Unfortunately, in the drive for realism, Wahoo and Zwift are accurately recreating the fact that even in real life, 36x11 is a low gear if you’re racing against others who will be using more traditional 52x11 road bike gearing.
Its great gearing for rough terrain and climbing but not for flat tarmac. So until Zwift add a bunch of off-road races, if you really want to race you might be better of getting some second hand road bike for you indoor machine and save the nice Trek for outdoors when allowed.