Demerits of normal life. Demerits of normal life.

"Demerits" is a strange word to use here. "Disadvantages" would be more natural, or "drawbacks"

Our world is going back to normal step by step? Our world is going back to normal step by step?

"step by step" means that it is in process

Start froming last week, all the restaurants, bars…allow are allowed to closed at 10pm. Starting last week, all the restaurants, bars… are allowed to close at 10pm.

Or "Since last week" Or "all closed at 10pm"

This was the very first week of our almost “normal" life”. This was the very first week of our almost “normal" life.

This sentence lacked a verb

What haves happened? What has happened?

ThingsHere are some things I have I hated so much! Here are some things I have I hated so much!

This sentence lacks a main verb, which it should have to be a proper written sentence, unless you're writing to represent an informal spoken style.

First, traffic jams! First, traffic jams!

Using the exclamation mark like this shows that this is an informal style, more like spoken English, so I'll leave it without a main verb.

LIn the last 3 months a lot of people nemany people have needed to working at home, and students have not needed to go to school… In the last 3 months many people have needed to work at home, and students have not needed to go to school…

The road condition iss have been amazingly smooth. The road conditions have been amazingly smooth.

But this week ishas been horrible. But this week has been horrible.

I wish this interface would give me a view of your entire original piece; I'm not sure of the verb tense pattern.

Second, Ddrunk Person atpeople in the street. Second, drunk people in the street.

I cannot guess why Drunk Person was capitalized.

Usually, you will see many drunk person atople around 12pm or later. Usually, you will see many drunk people around 12pm or later.

Sincenow that restaurants and bars closed at 10pm. now that restaurants and bars closed at 10pm.

This seems to be part of the preceding sentence

Last night when I was walking to the train station from a bar., Last night when I was walking to the train station from a bar,

This is only the first half of the sentence, so it shouldn't end with a period

I saw at 3 drunk persons sleeping on the street. I saw at 3 drunk persons sleeping on the street.

Now, I like our un-previous abnormal life more than the current normal life. Now, I like our previous abnormal life more than the current normal life.