OtterBox

I tend not to buy phones very often, but I'm upgrading soon. The main advantage I know of with Otterbox is the warranty, but as far as quality and protection are they still worth it or are there better value alternatives?

(Please ignore how dirty the case is, I’ve had my phone case taped to my phone for the past 6 months)

Over the past two years, I have owned two otterbox cases (iPhone 11 pro) and both have had the outside rubber begin to peel away from the back of the case after 6 months of use?? After a year they have both become completely detached from the phone to the point that I have to tape the case to my screen. The first time I just assumed it was a faulty batch or something but it’s happened again. I only started buying from the brand because people here raved about the quality and durability but these cases have lasted far less than random £10 cases from Amazon that I’ve owned in the past. Am I doing something wrong here or do they just do this???

I’m aware they have a warranty (although, as I bought from Amazon in the UK I don’t qualify for a replacement) but even then, a year is such a short time for a case to last… I know no phone case will truly be BIFL but it'd be nice to have one that doesn't resemble a brick that can stay together for at least a couple of years.

Edit: I have no issue with the cases protection! This one’s done a really great job (even when it was taped on) and my phone is still in perfect condition! My problem here is that the side rubber part has come away from the case (and warped so it can’t be glued back on). In an ideal world I’d have another fashion/aesthetics focused one that just doesn’t disintegrate but I am taking the other blocker high protection ones suggested into consideration (seeing as from what everyone’s saying, I don’t think what I want actually exists). Really appreciate everyone’s input!