Please try this path,
iPhone > Settings > Accessibility > Display & Text > Show Borders > please toggle off and on and the restart your device. That might help or you might prefer the look of show borders. However, LD150 is correct, the glint you don’t like is how Apple designed the interface..
Apple has changed the look of Mac OS and iOS multiple times over the years. Every time there are those the are challenged by the changes in appearance and functionality of some aspects of the User Interface. This is nothing new.
Apple’s installed user base is over 1.5 billion users. Making a single user interface perfectly compatible for every user is literally impossible. Apple will make changes (or not make changes) based partially on the feedback they receive through their official channel, linked below and good luck.
Product Feedback - Apple
Apple and Apple Support do not participate in the communities here. They only moderate our posts to ensure all user guidelines are followed in regard to content and user behavior. Your thoughts comments will not be reviewed by Apple. Good luck!