MC says he doesnt wanna be a mooch to elf girl but yet his life dream was to be a mooch king not doing anything..... this makes his characterisation even worse then I remembered.
Isn't that a different thing? He genuinely believed a king doesn't need to do anything much in his position as a king. Like maybe spend an hour a day to listen to and give orders to underlings but otherwise there's nothing much to do, aside from indulging in luxuries. But that would still be doing the "job" of a king properly. It was an exceedingly naive belief, but that was his personality. Besides, if you think about it, he's actually a harder worker than most. He trained and fought monsters and demons for years, apparently saving a lot of people in the process, to get his demigod powers. His talent is on a cheat level, but he still did work for it and risked his life endlessly. It makes sense he has a little bit of pride.
If he had more wits and common sense, he'd realise he already has everything it takes to live an easy life by earning enough money occasionally and then just lazing around for a good long while.