Looking over it I think it just comes from the shear amount of votes forced against you. You have 10 teammates as a Bass vs the 11 Gophers. But even if everyone on your team likes you, Eva isn't gonna vote for herself. So its the 11 Gophers with negative base points plus Eva's vote, making 12 against you.
I let this reply sit unsent because I was trying something out. I talked to Lindsay over and over every timeslot to boost her opinion of me and it turned the tides of the vote. I also went for the alliance with Heather to try and boost her opinion a little, but I don't know if it helped given that she just walked away from me when I asked.
TL;DR: If you're playing Bass, talk to a single Gopher player on repeat until they max opinion of you. You should end up with enough votes to beat Eva.