Back To to the Chaotic City! Ugh!

I would greatly appreciate your help.
I returned from one of my favorite places on earth last week.
Here in Tokyo, my city, we have has the most crowded sky in Japan, which is why I call it the chaotic city. What do you mean by the most crowded sky? Do you mean "we are the most crowded city in Japan"?
It was cooling off a little bit when I got back from my vacation. It seems like Autumn is coming early which is with its comfortable weather and without insane humidity or chilly weather.

One of the best way to herald recognise the arrival of the new season is that some signature photos and text character sequences appear on a signboard in a store.

People might say that Tokyo is a beautiful city in it's own way as my friend mentioned. When did your friend mention this? You should include that otherwise this is coming from nowhere.

I already miss being surrounded by the sounds and colours of nature so bad very much, like there is in the very rural island of a very rural island Maui have.

"So bad" is really colloquial and not grammatically correct although you do hear it being said! I wouldn't use it in written English. 

When you feel down, you could can look at the clouds like a delicious cotton candy and take a deep breath of fresh air into your lungs. And then, on the count of three, you will feel much better. That was my experience in Maui, and this is the way and I actually recovered from the sadness I felt at that time was in through that way.

These neon lights and the glow-in-the-dark night gets me hyperventilation makes me hyperventilate and irritates my eyes. Ugh!

I seem like a city girl... no longer.