I agree. I have the Pixel 5a and I regularly get 2 full days of use on a charge, and sometimes 3! Granted, I mostly just use it to surf the internet, but it has never lasted less than a full day (18+ hours).
I couldn't disagree more regarding the Pixel 5a battery life! I have consistently gotten 10+hours of screen on time using it for a variety of tasks. 2-3 hours of video and podcast streaming, web browsing, you make it, the battery will definitely last a full day. Don't know what you did to come up with your numbers.