In Demon Slayer, Zenitsu seems to hate Inosuke.
First of all, I am aware that Zenitsu and Inosuke started off on the wrong foot. Inosuke and Tanjiro did not start off on good terms either but, Tanjiro and Inosuke made friends.
When watching it for the first time, I thought that Zenitsu and Inosuke had made friends with each other or would eventually. However, Zenitsu hates Inosuke and is always mean to him by insulting him. While the insults could just be from annoyance, there's also the fact that Zenitsu does not care about Inosuke's well-being.
Why does he hate him so much? Do they ever become friends?