a sheep without a spleen- it may be a tzaar for you, but imagine the reward you will be getting! l’fum tzaara agra.
l’fum tzara agra doesn’t really apply here. By sukka, if you are in tzar then you are completely pattur from sukka, it’s not even a chumra to go in the sukka anyway (except perhaps the first night). One who does sleep in the sukka despite the tzar is not called a tzadik but rather an am haaretz.