Is Richard Dawkins's interpretation of the theory of evolution circularly?
The following is more an extended comment than an answer...

Why the question is off-topic

Your question has actually nothing to do with biology. You are looking for a purpose behind the existence of organisms. Science does not care about purpose, nothing has a purpose, everything just happen mechanically. If the theory of evolution gives you a bad feeling, then I am sorry for you that it does but that point is not to be discussed on a science forum. I am voting to close for this reason.

Tautology

Please note that evolution is the science that has for goal to explain the change in allele frequency through time. The process studied is a continuous succession of reproduction and therefore in some respect a repetitive process but it does not make the explanation of how change in allele frequency occur a tautologic explanation. You will note by the way, that evolution does not explain the origin of life, this is the role of another of field of biology that we call abiogenesis.

Did you say Dawkins's theory of evolution?!

I often get a little mad when people write Darwin's theory of evolution thinking this is a modern concept. But writing Dawkins's theory of evolution is even worst. Dawkins is foremost a popular science communicator, so there is really no such thing as Dawkins's theory of evolution. Dawkins was also a researcher before and he brought some knowledge that allowed to grow our theory of evolution which we call the modern evolutionary synthesis (some argue that we should rename it Extended evolutionary synthesis in the light of recent discoveries).