Many lifters learn the bench press from powerlifters. And powerlifters certainly know a lot about it. But remember, their goal is to lift the most weight possible for one rep, and they often use special lifting shirts.
If your goal is to build size as well as strength, and you lift raw (without a stretchy lifting shirt), then your pressing form will be different. Here's a quick video lesson.
Why do so many lifters follow programs that fail to fit any of their equipment needs, exercise issues, volume or intensity issues, or personality? Dan John calls it the "Cinderella's Stepsister Syndrome." In other words, the shoe don't fit! Here's how to find the right shoe for you. Hopefully, it doesn't have a 6-inch clear plastic heel, you tramp, you.