Everything associated with her was beautiful, kind, and 'positive', and, on the contrary, everything criticized by her was 'negative' and should be avoided.

I’m not sure “on the contrary” is wrong, but I feel the sentence works better without it.

I started to slowly accept this fact and [build up my standards of| establish my own standards] for judging people.

“Build up” sounds like you already had standards and you started to expand or strengthen them. I’m wondering if maybe you mean you were establishing standards of your own, separate from your mother’s.

Some people I was told to bwere bad awere just normal people, and even nice.

In some situations when this conflict canould not be avoided anymore, I either haved to blamcriticize other people who I think aought were factually correct, or I haved to oppose my mother's words.

Switching from past tense in the previous sentence, to present here, and back to past in the next doesn’t work well, in my opinion.

To criticize is to point out wrongs, mistakes, shortcomings, etc. To blame is to assign RESPONSIBILITY for wrongs or mistakes.

Some people I was told to bwere bad are just normal people, and even nice.

This was a tough experience I hadve to say...

These made me feel pain inside and were the main reasons I chose a uni far away from home as soon as I graduated from high school.

In the United States we usually don't say 'uni', but just college or university.

Everything associated with her was beautiful, kind, and 'positive' and, on the contrary, everything criticized by her was 'negative' and should be avoided.

However, as I grew up, went to school, and gained more knowledge, I started to realize that she could make mistakes, too.

It all went on like that for a while, but as I got older I found that so many things I had learned as a child were wrong.

Some people, I was told to be bad, are bad but it turns out they are just normal people, and even nice.

The real world can be just the oppositeturn out to be the opposite of what you were taught.

This was a tough experience, I hadve to say...

I had to destroy the world myself, and I found myself in pain at home.

In some situations when this conflict cannot be avoided anymore, I either have to blamedisagree with other people who I actually think are factually correct, or I have to oppose my mother's words.

Theseis made me feel pain inside and wereand is the main reasons I chose a university far away from home as soon as I graduated from high school.