Am I being too harsh wanting to break up with him because of this?

So I’ve been with my boyfriend for 5 months now (he’s 31 years old) and I finally went to his apartment for the first time and his sink was FULL of moldy dirty dishes that had to have been there for months. I made him containers of food when we first started dating and those containers were still in his sink full of mold. I wanted to throw up. To make things worse he had the audacity to tell me he doesn’t like doing the dishes and that his ex used to do them and he ASKED ME IF I COULD WASH THEM FOR HIM. Is it wrong that I was immediately turned off and want to break up with him now? Not only that but he had toe nail clippings on the table where we ate and I just was so grossed out.
Am I being too harsh wanting to break up with him because of this?
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