I think that's right. In German I hear it as [Hyp]o[the]se with equal stress on each [.] In contrast to the (typically mad) English spelling sound mapping where it's hy[poth]esis but still [the]sis. imho the real question is why English is so weird, not why do Germans pronounce hypothesis oddly 😆

Gah, I've now listened to the word Hypothese pronounced many many times from all over the web and I'm thoroughly confused, no longer know what a syllable is, and am considering taking up sign language.