Earlier quoted context omitted.
It can be demotivating. I use other language learning apps (not Duolingo, which is garbage), and I try to maintain a streak not because I care about it, but because I want the daily habit. Nevertheless, the number goes up… and help but get attached to it. I mean I don’t care about the number per se, but it was a reminder of my good study habit, which as someone with ADHD is an accomplishment itself. Then, like GP, I…
Out of interest, what other language learning apps are you using? I'm going to Portugal nest year and learning Portuguese through Duolingo at the moment. It's ok and some stuff is sticking, but I can't help but feel some of the why is missing and I'm just learning how to interpret their questions, rather than learning the language (I guess that's your problem with it?)
If I were in your shoes, I would do Memrise to fill the little moments throughout the day. But the focus of my studies would be (1) a local community college Portuguese course; (2) the FSI Basic Portuguese course (or another drill heavy course from the 60’s, maybe linguaphone?) for self-study drill practice, 30min a day; and (3) a good sentence deck in Anki, minimum 10 new cards per day.