For Fairphone, you're comparing against a Pixel 7 - which is a last year phone. Compare against the Galaxy S23, which has a Geekbench score that is ~50% higher than the FP5. Compared to iPhones it's even worse.
As per how they compare, reviews of the FP5 seem to say it has the following deficiencies:
* Poor display - bad brightness, which hurts outdoor usability
* Bad battery life, even considering the wimpy processor
* Underwhelming performance, which will make it feel sluggish faster
* Mediocre speaker performance
* Mediocre cameras
You're paying a whole lot, in my view, for something that has an easily replaceable battery... which is something you might do maybe once in the life of the device? If you're keeping a phone longer than 5-6 years, I suspect performance of the chipset is going to become a big issue. Additionally, with the bad battery life/performance already, it'll incentivize you to want to upgrade even sooner.