I think hate is the wrong way to look at it. The simple fact of the matter is the gaming market is one of the most oversaturated markets out there. There are far and away too many games for people reasonably play even 1% of them. So given such an "embarrassment of riches" people look for any reason to not play a game.
Which is where the RTP comes in, it's so overused that people are bored of seeing it. So when it comes time to pick between your game and someone else's, if you're using RTP and they aren't, your game gets tossed out. Treat it like a job interview, by using RTP you are basically ordinary, the same, uninspired, no drive, etc... No different than the legions before you. Where as if you at least go for a unique look, you stand out from all of that.
People like to say the most important thing they look for in a game is mechanics, or story... But the actual reality is, they will see your graphics before that. Just look at how game markets are setup, you see screenshots (or sometimes just an icon like on Android), then you have to click on that, and then if you scroll down you'll finally get to look at things like story or mechanics. More likely they'll click through your screenshots, and then decide from those.
Don't believe me? Pay close attention to your own habits, and see how you normally browse through games. Ask yourself if someone else released your game... Would you stop and look at it? Not going to lie, I scroll by hundreds of games where you only get your icon to entice me. The fact of the matter is there is just so many, I don't have the time to read up on everything. Nor am I interested in doing so, I highly doubt anybody is.