No one thrashed your cover. You made a thread asking for tips on how to get VIEWS. We gave you tips, saying that your cover, synopsis, and title won't attract views. I, for example, didn't even state my opinion on your cover. I didn't say I like it or dislike it. I merely stated that it wouldn't attract any readers(should've added that I was talking about SH, to be fair). And I ended up being right.
I potentially agree for now that RockiesRetriever is wrong about what he said about being "trashed on". Because if you/Sailus is true, its not really "trashing" but more like "bitter truth". I didn't check the thread about it but just looking what both Rockies/Sailus said.
[The truth hurts] so its not a reason to say "people trashed on me" because it hurts. But if this people added insults, mocked, or criticized without decent valid points then yes its being trashed on and posts should be reported.
Also "bad" is relative, and depend on context.
Quality is "good". Its a not-bad cover of footprints in snow. But if the topic is "is this cover able to attract views" then it's grammatically correct to reply "its bad (to use this for views)".
A "gun image" as cover is good if it's a bloody action series but BAD if it's for a wholesome romance series without any guns.
In short, it's always good to take a step-back and look at things in a neutral way. Some people give good advices, some give bad advices, some trolls, some trash/mock, some are just "eating melons". And it's bad to misunderstand the good advices with bad ones.
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PS : A good way of thinking is to be like a "food judge". To be neutral and not let emotions influence too much while evaluating things.