Can you please correct these sentences. Thanks. №33

He wears glasses, brown shoes and a suit with a waistcoat which cost as much as $3000.
He finished his work, sat on the nearest bench, and ate a chocolate bar. His eyes still hurt and he saw world around a little bit blurring (the world around him was a little bit blurry/the world around him looked a little bit blurry/his vision was a little bit blurred).
The heads of the competition didn’t know where the winner lived, but a half of year half a year later they finally sent him a prize. This way award has found its champion although a little bit later.
(Not sure the best way to say this, but maybe "The award found its champion -- a little late.")

He can’t endure these gossips, these lies come from everywhere. If only he had enough power and reliable friends to help him, he would change everything.

He felt bad that his friends had betrayed him, not because he found himself in such a difficult situation, nor because he had lost them as friends, but because he realized once again that he just couldn’t choose good friends.

I can’t say that she hate chores like most of us. Somehow she found it pleasant. She said that it gave her harmony and serenity. It was her mother who had taught her to think this way about routine work.

He is far smarter than his teachers think of him. Maybe he doesn’t answer their questions during lessons, but only because he is too shy and afraid of giving the wrong answer.

It took much more time to come up with the exact words to express her emotions than to type it. But the thing that took as much as 3 hours to do was to press the “send” button.

“Another mug of coffee and I will be ready to go home. I haven’t warned up yet,” she said, and took a gulp of flavored coffee. [You mean coffee with vanilla or hazelnut flavor? Or do you mean the coffee is flavorful itself?]

[Watch out for verb tenses. Within one paragraph, unless you know exactly what you're doing, the tenses should agree if things all take place in the same general time period. And if you are already in past tense and want to describe things that happened before, you have to use the past perfect, e.g. "his friends had betrayed him."