I feel we’re missing context. The core question is the utility of the first to the second, either in terms of helping with the quest or at least by dint of providing pleasant company, relative to the effort the second invested for having the first join their journey.

If the first was just a drag, some stranger or acquaintance that heard about the quest and wanted to tag along, made nothing but trouble and the second figuratively carried them all the way out of sympathy or kindness, I’d have some measure of understanding for their frustration. Their outburst would still be pointlessly rash and vengeful, given that the effort is spent already and kicking the other off won’t restore it, particularly without knowing the motivation (for instance, the vanilla ice cream being particularly delicious there), but in making someone else haul you along on a difficult quest, apparently with little regard for whether that effort would be worth it or clarifying their stakes from the outset, I’d rule that ESH.

But if the first pulled their weight or even helped, it would be straight up ungrateful and cruel over nothing but personal preference.

Why am I overanalysing the morality of a four-panel comic again?