How important is it to have talent to become airline pilot?
You are asking the wrong question. Ask yourself this:

Do I really want to become a pilot?

If the answer is yes, then you can become a pilot. You only require hard work, and a lot of money (but we are not talking about this).

Having talent is subjective. Sometimes you try to learn something new and you get into that relatively quickly. Sometimes you don't. It doesn't just depend on talent, but on several factors.

If you feel that you are not making any different mistakes than other student pilots, then change your instructor.

There are several discussions about changing flight instructors. You can benefit from these ones:


What to look for in a flight instructor?
Is there a downside to trying multiple flight instructors?