Question about Apple iPhone 13

I received my iPhone 13 about 4 days ago and am actually extremely satisfied. Everything fits. The colour, the workmanship, how smoothly you fly through the operating system and the camera is a huge improvement compared to my iPhone Xr! Only one thing bothers me: the battery. Maybe that's complaining at a high level, but for such an expensive and newly released model, I'm surprised and disappointed that I'm still at 92% after 25 minutes of surfing, watching YouTube and listening to music. Also, on a relaxed Sunday, the battery was at 15% after 4 hours of screen time (again: surfing, YouTube/Netflix and listening to music). Compared to a good colleague who was able to get by with his new iPhone 12 for over 2 days a year ago, with roughly the same screen time and similar activities, the battery performance of my iPhone 13 is a real indictment. Maybe I expect too much from the device, but I only read good things about the battery in all the test reports and also here on digitec in the reviews. Is it possible that the battery in my device in particular is so "bad"? Is it really just me complaining at a high level, or should I consider sending the device back and go for the iPhone 12 or 12 Pro? Just as a quick info: I didn't order the device from digitec myself (better price through my employer due to partnership), but I am a loyal customer and have often been able to find helpful info/answers in the comments/questions below products. That's why I turned to the digitec community with this problem! I am grateful for any feedback!