We all have weaknesses. That makes us human. If you are aware of your weakness, you have more chance of doing something about it.
Some people only review their writing to look for ways to improve that piece. That is a very important task, but if you only focus on one piece at a time, you are probably missing a trick.
If you look at your work more generally, you will probably be able to spot consistent weaknesses and bad habits. By working on improving those areas, all your work should improve.
You will still need to review & re-write your material, but the process will be easier if you can improve the basic standard.
This post explains how to carry out an autopsy on your writing.
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