Listen, if your SO doesn't want to hear you infodump about shit that means absolutely nothing to them, just because it is intensely sexy to watch someone being passionate about something, dump their ass.
I love it when my wife goes off on weird ass fucking tangents about what some member of the Hapsburgs got up to, or the particulars of Czechoslovakian military uniforms in the 1980s or whatever, because it's just so cool watching her be so invested in this stuff.
Find someone who appreciates passion, and appreciate theirs in kind.