Statistical usage data is hugely different from your personal data FYI
The iPhone I had the issue with was 3 years ago...but Apple slowing down iPhones was news last December mateIf all you got is something from 3 years ago I feel sorry for you.
It's still personal data.
Where did you find a download that you trust?
Maybe it's just from years of shooting I see the flaws in rendering so much more.Could be. Especially if you're really looking for professional results one would expect with a couple of lights and modifiers, and made by a professional portrait photographer with many years of experience.
I think most who like to make casual photographs of their friends and relatives will be happy with the results, knowing they have neither the skill or equipment to produce the above.