peak performance was being a literal child, it's been downhill ever since

A nostalgic, melancholic text post listing ideal life conditions (financial stability, health metrics, mental wellness) followed by the punchline that the author achieved all of these at age 8, implying their life has only declined since childhood. The tone shifts from aspirational to darkly humorous.
Extracted text:
No debt
Ideal weight
8 hours of sleep
Mental health on track
Right nutrition
Zero Alcohol
This was my peak. I was 8.
Good times...