Ok I'll try again because I sense you're trying to understand this.

Yep my costs of living have been rising, particularly rent - I live in the UK so this is less relevant to our discussion about a US president, but sharing because you asked.

One person's costs of living rising is not the same as the general trends that the author highlights, which include millions of people's lives across the whole country. To compare your personal costs rising to literal millions of people is missing the author's point completely. Your personal costs rising proves nothing about the general situation across the whole country - it only proves that your costs have risen, that's all. If you want to apply your personal experience to the whole population, you'll need to back your argument up with facts, figures etc, which you haven't done.