Amazon has never been a good website. On the list of ecommerce sites not to copy it ranks #1. It's not focused on usability.
However, there are ways to find exactly what you're looking for. It relies on prior research on other sites. If you know the model number and brand of the product you want, the chances of bringing it up on first search is pretty good.
Most people don't shop Amazon for the experience. They shop there to place 1- to 2-item orders they want delivered asap.