I've been using Memrise for learning vocab, and it's just going awful. I review the words a few times a day. Each time and everyday I miss the same words. After a few weeks I may finally get a few of the words right, but after not having the words for a few days I just start missing them again. I've been using the Core 2000 decks in Anki too. It goes better than Memrise, not missing nearly as many, but still seems I'm pretty slow at learning. Am I just not cut out for learning Japanese or what?