ive seen people get mad at others for even just watching ponylife, its pathetic, im glad you like it though, i honestly like some of the design choices and new characters but i can see how people would get annoyed by it easily by it. i did too at times.
but yea you're right, people should just like what they want, dont get angry at it. and while looking back the movie did definitely have flaws, i dont think it needed a villain or over arching heavy lore drawn story but it was a tad predictable and lines felt a bit off or immature at times (especially with sunny skies' song, the lyrics were VERY simple for a guy that had a very great range in tone) but it did bring more good than bad. the character designs and new setting were refreshing as i mentioned before and even if it wasnt the best i do think it deserved more recognition than it received.