I genuinely love Trixie. I think shes only mean because she has to put up a front. She's been run out of town more than a couple times, so she's grown tired of the hurt. In order to distance herself from people, she plays a couple steps ahead and makes people dislike her, intentionally. Which isn't hard, with her character how it is, all she has to do is not hold back her ego. I would love to see her vulnerable, and unafraid, I like her in the later season more than ever actually cause you actually get to see different sides the her than the bad bitch show pony who dont need no man. Now for a self insert ship, she's definitely a challenge. It's not about I can fix her, in this situation it's about who can dominate who first and set the precedent. Do you want to make her someone she's not? Get her to act nicey nice, or even stay in one place for once? You'll be comfortable, but she won't get to be the person she wants to be, and in the end it'll make her miserable, and resentful...or, if you can bear it...so you ride around on her coat tails, pulling her cart for her, kissing her feet...all in the name of her fanciful dream of being a magician, in a world where magic is common practice. That's like if someone made a show of watching them do plumbing or electricity. Sure it's a skill, but it's so...normal. it has its benefits sure, you get to see equestria, and play with her pretty pony pussy. But she's also a valid cunt, who thinks herself above work and chores, and will take advantage of you every chance she gets...just to get ran out of every other town she does a show in, because of her poor skill and bad attitude, scraping in very little bits. You won't be comfortable, but she'll be happy...and if your standards and self respect are low enough, that might be just fine...
Also she's really fucking cute