Regarding my comments about the Anki default settings: I encountered this first when I tried to learn using the (actually quite good) Genki 3rd edition decks:
Genki 1 3rd edition: Genki 1 3rd edition with sound files - AnkiWeb
Genki 2 3rd edition: Genki 2 3rd edition with sound files - AnkiWeb
Styling and manual answer input by yours truly: GitHub - opx-gh/anki-genki-3rd-edition-kana-input: Modified card templates for the Genki 1 3rd edition (https://ankiweb.net/shared/info/1742947823) and Genki 2 3rd edition (https://ankiweb.net/shared/info/969261095) Anki decks, which allow for the input of Hiragana / Katakana.
The problem with these decks is apparently that the author used subdecks instead of (nested) tags. Because of this, Anki would pick random vocabulary from all of the subdecks, which (in this case) is not exactly useful.
So, after searching around for a bit, I realized I had to turn on the Anki V3 scheduler, which fixes this problem by default (because it will go through the decks sequentially). Naturally, I searched whether there are other settings which really should be changed and stumbled upon quite a few resources which had nothing good to say about the defaults. 
Like:
- Best Anki Settings: My Recommended Values (Updated for v2.1+)
- The BEST Anki Settings and Algorithm Explained (by an expert!) - YouTube
- New from morteASD: Tell me about your Anki setup - #18 by morteASD
And, together with the fact that understanding how Anki handles your answers and how the Anki concepts (of notes, cards, fields, templates) work together is not exactly easy this got frustrating enough for me to quit. 
But I guess in the long run there is no better solution.