You're looking at these strength standards as if "beginner" means "bad". It doesn't. It's just an arbitrary label someone decided to slap on arbitrary numbers. What you should be focusing on is whether or not you're progressing. That's where you can make judgements on whether you're doing well or not.
As for your issue with DB bench, my solution would be to drop the weight and do something differently to make it harder when using lighter weights. That can mean any combination of the following: increasing the number of reps, increasing the range of motion, or increasing the duration of the pause at the bottom. For comparison, my work sets for DB bench are typically 30-40% of the numbers I use on barbell bench. You're currently doing 85%.