well he screwed Raphia and his eastern campaigns were nothing special really.

he followed Alexanders path, scared some rebellious Satraps with his big army (I mean he didn't really defeat anyone just forced them to sign treaties which none of them took too serious as soon as he was gone). and then went back and started a little propaganda campaign showing him as the new Alexander...

sure he wasn't all that bad but never enough for a title like "Megas"