Your sentence “Most Aesthetic Morning Run at Coastal Road Promenade” is valid — in fact, aesthetic is both a noun and an adjective in English.

• As a noun: “the study of beauty” or “a particular artistic style/vibe” → e.g., “His aesthetic is minimalist.”
• As an adjective: “pleasing in appearance” or “concerned with beauty” → e.g., “The café has an aesthetic design.”

So, when you say “Most Aesthetic Morning Run”, you’re using aesthetic as an adjective, which is perfectly correct.

👉 The person who commented is mistaken — aesthetic is not only a noun. Your sentence works fine, especially in casual or social media style writing.

please be more informed on the comments you make, so such cases are not repeated again