I'm currently reading through Benny's Language Hacking Guide, and one of the points he makes is that he labels language issues as "different" instead of "difficult" (p. 30). This is dead on.
Not applicable to languages.
If a five-year-old native speaker can figure it out, you can too. And they usually can. When I took Russian back in high school, my teacher told us that five-year-old kids were doing just fine with many of the cases that foreign learners struggle with. And I can tell you that my own five-year-old daughter is doing just fine with Japanese, English, and Chinese. If you're reading this, I'm pretty sure your cognitive abilities are superior to just about any five-year-old, and if they can do it, you can too.
When something is different, it means you need to spend some time to figure it out. Depending on how different something is, the amount of time you need to spend will vary. Saying something is "difficult" is really just drawing an arbitrary line in that amount of time and considering anything past that line to be difficult.
But it's not difficult (remember the five-year-olds). It's just takes more time.
There is no such thing as "difficult" in language learning.