I gave japanese a go in june of last year and managed to learn about a thousand kanjis before anki finally burnt me out and I don't think I'll ever have the heart to give it another shot. :/
Anki suffocated me. In the beginning, I'd do it every morning and that was fine, but towards the end, I'd procrastinate every day until late into the evening, and I wouldn't allow myself to go about my day until I did all my cards.
So, even though it only took me 30 minutes to do, the fact that I had to do it weighed down on me for entire evenings and was suffocating.
I still vividly remember the day I decided to give up: I hadn't felt so free and happy in a while.