I have a cheap 2014 Motorola Moto G and I have the same "problem". Yes, there are hundreds of modern phones out there which are several times faster and have way better hardware but the Moto G is fast enough for me.
I usually just browse the web, type a few messages in Whatsapp, take a few pictures, ... and the phone does all of this well enough so that I just don't have any reason to invest 500+ Euro in a new phone.
Another bonus is that if I accidentally drop my phone I can just buy a new one (or two) and it will still be cheaper than an iPhone or other similar phones.