Even powerful enough to bargain with an existence like Styx, Lansendel would absolutely not easily touch the other party's bottom line.
Besides, this world doesn't hold the value that would make him challenge authority.
Although Lansendel is not afraid of authority, he isn't really stubborn enough to go head-to-head with matters unrelated to him.
Since this world already has an explicit allegiance, it must respect the will of its master.
Thus, Lansendel's lack of enthusiasm and friendliness is surely because Styx has its own thoughts.
Also, the most fundamental matter... Given Josh has no followers in this world, it's indeed understandable, but likewise, Lansendel won't have any fondness towards them.
No matter what fault Josh may have, at least his intentions are genuinely kind, without any plan to demand anything in return from the other party.
However, such goodwill is completely ignored... simply because of those apparent shortcomings.
