Your PC wouldnt know a 'ranged trip attack' if it hit him in the face. He literally just tossed a warhammer at a childs legs, trying to knock the kid to the ground without harming him too much.
I told the DM I wanted to throw my hammer so that it would knock him down without risk of killing him or doing serious harm He said yes. Was there any chance of killing the kid by doing this? He said no.
So stop making up a scenario that didn't happen and stop telling me what I and my DM thought was reasonable.