As the matter of fact, she was a person who hard being convinced for instant, she certainly would likes to thinks that his opinion are the corrected then any one else view.
1. Article use:
Only use “the” to refer to specific items; for singular non-specific items use “a”.
2. Word form:
Although the sound is similar, don’t confuse “instant” with “instance”. The meanings are quite different.
3. Passive form:
While “hard being convinced” seems to be a passive construction, the form is incorrect. Hard needs to be introduced by “was” and followed by an infinitive ("was hard to convince").
4. Verb form:
After a modal verb, use the verb name (“like” not “likes”).
The infinitive is formed from “to” + the verb name. There is no “s” or any other verb ending on an infinitive, so use “to think” not “to thinks”.
6. Pronoun agreement:
It makes more sense if you change “his” to “her”. "His” is possible, but it doesn't make as much sense.
7. Word form:
“Corrected” is a past participial adjective. Here, however, a comparison is needed (i.e. something like "more correct"). A good solution would be to change this expression to “better”.
8. Word confusion:
“Then” and “than” often sound alike, but they are quite different. Here, you need “than” because there is an implicit comparison.
“View” belongs to someone (in this case, “anyone else”), so it needs to be possessive (anyone else’s).
The first independent clause ends with “convince”, so a semicolon is needed here.
As a matter of fact, she is a person who is hard to convince; for instance, she certainly likes to think that her opinion is better than anyone else’s.