I never liked to study history in school, I thought it was boring and I’ve never been good at memorizing things.

1. Whenever the verb is the subject of a sentence, we either add “ing” at the end or put a “to” in front. In some contexts these are interchangeable, but in others only one sounds natural. In this context I think “to study” works best, but “studying” also works.
2. You have to say “I have” here. You could also use the contraction “I’ve”

I recently realized that I actually I didn' t have good teachers when was young.

Switching that word around makes it sound more natural

I watched some videos talking toabout the history of Brazil, Argentina, the eEurope dispute and also Falkland Islands.

1. “Talking to” implies that the video is talking with the history. You should say “videos about the history” instead
2. The word “also” here is unnecessary

I was amazed,. It's like to watching a series seeing how the old history reflects incompares to the way that we living today.

1. Again with the verb and subject rule here. But in this case, “to watch” sounds weird, so you should say “watching instead”
2. I understand what you were trying to say, but saying “compares to” sounds more natural

I never liked studying history in school,. I thought it was boring and I have never been good at memorizing things.

I recently realized that, actually, I didn' t have good teachers when I was young.

I watched some videos talking toabout the history of Brazil, Argentina, tThe eEurope dDispute and also the Falkland Islands.

I was amazed, Iit's likeinteresting to watch a series seeing how the old history reflects in the way that we living today.

I never liked studying history in school. Personally, I thought it was boring, and I have never been good at memorizing thingfacts and events.

I recently realized that I actually I didn' not have good teachers when I was younger.

I watched some videos talkdiscussing tohe history of Brazil, Argentina, the eEuropean dispute, and alsothe Falkland Islands.

I was amazed,. It's likefascinating to watch a series seeing how the old history reflects in the way that we're living today.

I never liked study history in school,. I thought it was boring, and I’ve never been good at memorizing things.

I recently realized that I actually I didn' t have good teachers when I was young.

I watched some videos talking toabout the history of Brazil, Argentina, the eEurope dDispute (?) and also Falkland Islands.

I was amazed,. (or “!”) It's like to watching a serieshow seeing how the old history reflaffects in the way that we livinge today.

Switching “series” to “show” sounds more natural here.

I never liked studying history in school,. I thought it was boring, and I have never been good at memorizing things.

Verb tenses and missing "have". Alternative, "I was never good at..."

I recently realized that actually I didn' t have good teachers when was young.

I watched some videos talking toabout the history of Brazil, Argentina, the eEuropean dispute, and alsothe Falkland Islands.

Article "the" was needed.

I was amazed, I; it's like to watching a series to seeing how the old history reflects in the way that we livinge today.

verb tenses here.