Dr Yildiz, You are setting a great example to fellow writers by taking action and turning your disappointment into a learning experience. I appreciate you sharing your mentor's feedback, and I have made a few notes to keep in mind.
I've read both of your ALS articles, and here are a few thoughts:
Length: I generally prefer reading shorter articles (up to 8 minutes) but will happily read a longer article if it discusses a subject I'm interested in.
Links: I find multiple links embedded in stories distracting. Others may disagree.
Image: I preferred the image in your first story. Though positive, the image in the second story could have connected better with the story's content. People love images with smiley faces and dogs, though.
The intro, explanation of ALS and the parts about your father in the first story were excellent and necessary for setting the scene for your story.
Technical words and language: Some words and sections may have been challenging and too specialized for some, e.g. mitophagy, mitochondrial uncoupling, mitohormesis, etc.
These sections were heavy going for non-scientists.
2 - Preventing Mitochondrial Dysfunction
3- Lowering Oxidative Stress and Chronic Inflammation
4 -Preventing Glutamate Toxicity
5 - Prevening Protein Aggregation
The takeaways are great.
Thanks again for sharing some excellent writing advice, inviting comments and feedback and being a great role model.