Mistwell
Crusty Old Meatwad
The battlerager is broken because all he gives up for tons and tons of THP is +1 to hit. A +1 to hit is big, but not as big as the insane amount of THP you end up with from battlerager. Also, the enemy has no way to tell without the DM metagaming that ranged attacks work much better against the battlerager. There is no PC knowledge check and THP has no visible effect unless the PC wants thje flavor text of his THP to be visible.
Let me put it another way.
I asked for advice on a single one-shot encounter character. Instead of offering advice, you've decided to lecture people on why in your game you do not like the battlerager. Despite many other threads that are about that topic.
Unless you have advice on how to build an effective battlerager for this kind of scenario, I fail to see why you continue to go on about the topic. What is your point, to make sure nobody ever plays one because you don't like them? To dive bomb any discussion of them because you don't like them?