Leetcode has taught me that I'm a bad engineer

Just like https://news.ycombinator.com/item?id=26468248 , I give up. I've been at it intensively for a couple months and my mind simply refuses to cooperate. If anything, after having done 400+ problems I seem to be worse at them than when I started. Since your time is more valuable than mine, let me summarize: 7+ YoE, MSc. in some science (like it matters) Last 4 years been mostly ETL with Spark and some backend thrown into the mix with a "senior" title for devops and mentoring noobs. I used to think this job was a creative one, since writing frameworks and libraries for further use, documenting code and extreme programming made me think that I was building something new and useful. In fact, due to having extreme ADHD the only thing that kept me distracted during all my overtime was the ability to pursue fun and challenging things. MPP and all the cool stuff you can do with modern tools is fun, interesting and challenging. Leetcode isn't about fun an