Task Response dictates the ceiling
If you fail to clearly answer all parts of the prompt, or your position fluctuates, the examiner determines you haven't completed the basic task, rendering other scores meaningless.
In an effort to show off vocabulary and complex clauses, the argument drifts, or paragraph two and three end up contradicting each other.
It is time to correct the wrong habits you have held onto for a long time.
As long as I write several complex relative clauses, the examiner will give me a Band 7.
If your Task Response isn't a 7 (i.e., a clear and consistent position), excellent vocabulary and grammar won't pull your overall band up.
If you fail to clearly answer all parts of the prompt, or your position fluctuates, the examiner determines you haven't completed the basic task, rendering other scores meaningless.
During practice, write your intro position on paper. When writing the first sentence of every body paragraph, check back: does this sentence support my main position?
These pages explain the Banfen Writing diagnostic and blocker-repair method, Task 1 overview, Task 2 development, and common score blockers.
Submit a real first draft, see clearly where your vocabulary and logic gaps lie, and replace ambiguous self-perception with real evidence.