What you're doing is pretty good. I don't know of any other user (haven't really looked around for them much) who has a perfect feature rate like you do. the closest I've seen over 100 submissions with a perfect feature rate is this guy here ... https://imgflip.com/user/elongated_monk
Back before 2016 you could see both the upvotes AND downvotes. There was an upvote/downvote bar and they did away with that to try and curb troll-ish downvoting. It worked pretty good, but before they did that, it was common that users were more likely to downvote a meme.If your meme started off with 2 downvotes and 0 upvotes, it would go back into submission, never to see the light of day. And the memes with a high percentage ration of downvotes to upvotes also got sent back to submission. I had a few do that back in the day.