>>106863641It's very subtle, but a lot of it has to do with the language used and the types of things criticized
If it's genuine hate, people are going to talk about the aspects of the work that most people would really notice and care about; things like plotholes, asspulls, and weak payoffs. They are specific in their complaints, but they rarely drift into the realm of nitpicking
If it's meme hate, it's a lot more broad. Criticisms are vague, with a lot of them boiling down to "it's bad because it's bad". The only cases of any specificity come from individual clips that people put up on youtube, and a lot of the criticisms are nitpicks of things in that paticular clip applied to the work as a whole, usually unfairly
There's also a difference in the way they describe the issues. If someone honest to god hates a work, they're going to use words like "bad" "stupid" and "sucks". If it's meme hate, people are going to use words like "abomination" "horrid" and "vile". The meme haters will exaggerate the hate a lot in order to really sell home how much of a ___hater they are to the rest of the tribe
Basically, you can tell the former's actually watched/played/read the work they're criticizing enough to come to the conclusion that they don't like it themselves, while the latter only watches youtubers talk about it and read social media posts and wants to be a part of the discussion
Here's an example; going back to sonic, if someone genuinely hated the games, they'd point to the level design or controls. If they meme hated it, they'd point out clips of glitches that the youtubers went out of their way to perform and act like the whole game was like that