I see you have a Felt e-bike. If feasible, put power pedals on the e-bike and use the motor power to make up the differential power required to keep you in z2 when climbing. If the Felt ebike is unsuitable then get a new one such as one of the better Treks. Use what is available to keep you in the game.

Ignore the noise on forums about ebikes. Use yours as a training tool / bio hack to get the z2 that you need with the terrain that you have.