Why are you so obsessed with those earbuds that come with the phone? Of course they are going to sound bad, what do you expect from such a tiny damned speaker?
If you're an
audiophile, meaning someone who cares about audio quality and wants to get the best audio possible, you're
not going to be using some dinky little earbuds. You're going to want to get a good quality set of headphones if you want perfectly reproduced sound.
Stop complaining, go to Amazon.co.uk (since you're in the UK), and find yourself some decent headphones worthy of being placed on your ears. Because these dinky little earbuds ain't it!