First of all, the claim that wild animal suffering is serious doesn't depend on the claim that animals suffer more than they are happy. I happen to think human suffering is very serious, even though I think humans live positive lives.
Second, I don't think it's depressive bias infecting my judgments. I am quite happy--actually to a rather unusual degree. Instead, the reason to think that animals live mostly bad lives is that nearly every animal lives a very short life that culminates in a painful death on account of R-selection--if you live only ~a week, you don't have enough positive experiences to outweigh the badness of a painful death.
Regarding the claim that I should be speaking out against factory farming, um...I'm not sure if you've read the rest of my writing.
https://benthams.substack.com/p/factory-farming-delenda-est
https://benthams.substack.com/p/weve-created-hell-its-called-factory
I refer you to my response to Said Achmiz's comment. Do you have a better way of estimating animal consciousness? Sure, the report isn't perfect, but it's better than alternatives. It's irrational to say "well, we don't know exactly how much they suffer, so let's ignore them entirely." https://www.goodthoughts.blog/p/refusing-to-quantify-is-refusing
But not all possible people are continuous wavefunctions!