Originally posted by Batman-Prime
While Thanos finds, in one year, the ultimate artifact to defeat Doom, Doom just plans for the day when Thanos appears with it, to steal it from him an beats him.
When they went for the THOTU, Doom got his ass handled by Thanos almost in the way you described it.
And if they had to fought again, Thanos would still outsmart Thanos-Lite (Doom).