I just watched the movie and I’m not sure how you came to that conclusion. I don’t read Dune books so not sure what happens afterwards but as far as the ending of part 2, there are a few notable points:
– he had visions of an attack causing millions or billions of lives lost and he attempts to avoid that at all costs.
– he offers, against his own personal desires to be with zendaya, to marry the king’s daughter in order to stop any further war or bloodshed
– he doesn’t slaughter the prisoners but only those directly responsible for killing his family.
– he himself fights instead of assigning someone else in that last duel. If he were an evil and selfish antichrist why would he risk dying?
At the very end he reluctantly, after being told the others did not accept his ascension and were going to attack, tells his men that they must prepare to fight. There was also foreshadowing when earlier in the from he voiced his concerns about all the lives lost if he takes any action and was told that sometimes our actions are chosen for us and we have no option but to respond.
Since this was their planet (his family and the local natives) and he had done everything to protect them and didn’t dishonor them, I don’t see how, based off the Part 2 of the movie, you can view him as being the anti Christ. If anything, he was standing up to the evil Js who slaughtered Christ and were now enslaving and subjugating the rest of the world.