If only I could get someone's help.

I've read someone's article a few days ago.

I read someone's article a few days ago.

She introduced her country about convenience of traffic and so on.

She wrote about her country, what it was like to live there, for example how easy it was to get around it. 

I didn't like the government of that country up to now because of their reflection of the past, history issues, etc...

I didn't like the sound of the government of her country because of how they have dealt with issues in the past.

I commented that issues on her article and got her storm of protest.

I commented on her article and she didn't like what I had written.

It seems to me that my act did not make much sense to her and I was not reasonable.

It seems that what I wrote didn't make much sense to her and that in her opinion, I wasn't being reasonable.

Since I wrote exposition of my views on politics to an article of one's practicing English, how foolish of me.

She didn't like that I was using her article to express my political views and practice my English-  how foolish of me!  (Are you being ironic here?)

In the future, I must be more prudent about what I do, and I only hope she wouldn't think I may be a stranger, -_-

In the future, I must be more careful about what I write about.  I only hope she doesn't think I am strange!

By the way, expressing a feeling in English is still hard to me.

By the way, expressing feelings in English is still difficult for me.

I don't think my feelings are well presented as you can see, but I can't find any proper expression (If only I could get someone's help)

Only change the end of this sentence, my suggestion-  but I can't find the proper way of expressing things. 

Maybe I should learn more about writing.

Well done- this sentence is 100 per cent correct!