Please tell me the grammatical mistakes in this sentence.
I would appreciate it if you could send me a corrected sentence.


I think that marriage is becoming less important today than it was in the past.
I have two reasons to support my opinion.

First of all,in recent years,increase the number of woman who working their company.
in the past,most woman has work in their home.
However,because of woman has been becoming get working to society,they think that marriage is needless for work.

Second of all, the woman who think child is needless has become increaseing
For example,a woman says that I am happy without child.
this talk would be surprising.However, also this like thinking has increasing in resent years.
It may be ending the era that connection with marriage and happy.
For those reasons,I think that marriage is less important today.

There are some small problems in this, as well as some big ones, but I think I understand what you are trying to say here. It would take a long time to point out every mistake, so I will just write it the way I would as a native.

“I think that marriage is becoming less important today than it was in the past. I have two reasons to support my opinion.

First of all, in recent years, there have been more women in the workplace. In the past, most women were housewives. However, because women are getting jobs that are contributing to society, they believe that marriage is pointless.

Second of all, more women believe that having a child is also unnecessary. Some women say they are happy without children, for example. This is surprising. However, this kind of thinking has been increasing in recent years. It may be ending an era where marriage and happiness are connected. For those reasons, I think marriage is less important today.”

Some minor points are, make sure you put a space after every comma, and make sure you use the word “women” when talking about more than one woman. “Women” is plural, “woman” is singular.