I went through a pedantic phase, but have got over it ?
The changes are actually quite fascinating, a reflection of history as it is happening!
It's not surprising that our language is changing rapidly - via the Internet, we now have close contact with English speakers from across the globe, so of course some mixing of the different forms of English spoken in these different parts of the world is happening. That's why more Americanisms are being used. They don't bother me - I just add them to my vocabulary for future use if and when appropriate, just as I do with any new words or phrases.
There has also been a big shift in the ethnic mix of our population, so again, linguistic change, of grammar, vocabulary and usage, is bound to happen, just as it has throughout history in times of rapid change.
Language and languages interest me, so sometimes I can see how a new word or expression has come into English from another language, either through a mistranslation, or just to fill a gap in English.
English is great (all languages are great), and I'm happy to see it continuing to grow, as it should. smile