Why do English pronounce some English words badly?

I found a great post recently which I will share with you dailywritingtips.com

So true! Why do you hear people say pacific when they mean specific, bold instead of bald (they've gone bold), I'm going to 'borrow her it' instead of lend it, I've won you, instead of beat you, bought you, instead of brought you and so on.

Have a look at the daily writing tips and the comments, some are hilarious.