overestimating, overrating

appreciating, cherishing, prizing, treasuring, valuingadmiring, esteeming, regarding, respectingadoring, idolizing, reverencing, revering, venerating, worshipping(also worshiping)

underestimating, underrating, undervaluing

minimizing, playing down, soft-pedalingbelittling, decrying, depreciating, disparagingdespising, disdaining, scorningabhorring, abominating, detesting, loathing