Saying Manhattan isn't very smart is like saying Tony Stark isn't very smart compared to Reed Richards.

he is very easy to trick and manipulate

So who can beat Superman?

One word: Gog.

I like these debates because they make me search my memory banks! Gog killed Superman and liked it so much that he went back in time and killed him again.... and again. And again!

You've got to have a hobby, right?

Thing is (after I've done a bit of quick research to make sure Gog isn't Magog), he was given some power from gods, what makes him more powerful than Manhattan? basically a god.

And to be honest, loads of people/character could kill Superman, my name sake already took out 3 'supermen', what's one more?

Even Brainiac is smarter than Dr Manhattan.

Dr Manhattan is nothing but a moody cry baby. Left the Milky Way galaxy because he got dumped twice, and someone out smarted him.

He left the milkyway to ensure peace on earth, because he didn't want those 50 million lives lost to be a waste. Would you rather stay on earth and ensure continual warfare til humanity was wiped out, or?...

He's no super hero then. Leaving the solar system is plenty enough, but the whole galaxy... Nah dude he got some emotional problems. The Dr, feats pale in comparison to Superman. lol

Does it matter how far he goes when he can just teleport back instantly?

Answer me this:

What could Supes do, if Manhattan teleported them both out inbetween to galaxies, where there is no sunlight for Supes to charge his strength with? Supes couldn't escape, because each time he'd try to fly away, Manhattan would just teleport him back. Eventually Supes would run out of power , and Manhattan could destroy him.

We don't even know for sure if he can teleport Supes. What we do know for sure is Supes is faster.

He can teleport everything else at least...