Does it seem like the older 《冰雪奇缘》 gets, the 更多 流行的 Anna gets and the less 流行的 Elsa gets?

Online- yeah, I totally get what you're saying. People are starting to look at Elsa without the rose-tinted glasses and see that her character has a lot of issues, and Anna is starting to be recognized for her multi dimensional personality instead of being thought of as the "useless" sister, which I am so here for.
Outside of the internet, though Anna is getting a bit 更多 爱情 (and 由 a bit, I mean a tiny bit), Elsa still reigns supreme overlord of young children and non-disnerds, so her popularity hasn't gone down (at least from what I've seen). Only strong 《冰雪奇缘》 haters seem to dislike Elsa, but they also hate on Anna, and a lot of times don't even know her name.

I didn't see 《冰雪奇缘》 until about a 年 ago, so I missed the early months of the fandom where Anna got hate (I find it hard to believe there was a time when she got only hate!), but when I came into it Elsa was still much 更多 流行的 than Anna. I don't really get involved in the fandom outside of Fanpop, so I don't know whether the Elsa 粉丝 are still active in other places, but here I've noticed it too.

Can't say I've noticed Elsa getting much in the way of hate (with the exception of maybe one 或者 two 粉丝 here - the majority don't seem to have an issue with her) but I have noticed Anna gaining 更多 and 更多 positive attention.

That said, I think Anna has been a 更多 noticed character among older 粉丝 for a while. Teens and adults seem to at least quote Anna 更多 when talking about 《冰雪奇缘》 (even if she isn't their favourite, she is clearly a memorable character to them all) whereas when I've done cover work at pre-schools I've noticed that Elsa is still the favourite among 3 to 4 年 olds! So I definitely agree with 你 that this is a thing that's happening mostly with the older fans.

Elsa COME BACK

Yes! Elsa is important, but, Anna keeps on getting 更多 popular, and I hate that. I think, the reason why the movie is called 'Frozen' because of Elsa! And a lot of the time, I see people saying 'Anna' instead of 'Frozen'! It's dumb!!!