Should I speak to my boss?

I work on a team with two other people. I’ve noticed one with more seniority is doing my work before I even have a chance to because they are afraid I’ll make a mistake. I looked into everyone’s work and found that the other teammate makes WAY more mistakes than I do and rarely ever does their work. This guy has a lot of seniority and I am afraid he’s bashing me to my boss without knowing my other teammate is doing much worse than I am. Should I talk to my boss? What should I say? I want to be careful because the other person making a lot of mistakes is the son of a higher up.

Should I speak to my boss?
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