After reviewing several texts about the second law of thermodynamics and the concept of entropy, from a systemic point of view, it seems to me that entropy is only a circular reasoning concept.
Thermodynamics raised from the study of gases, and gases can't exemplify all types of particles behavior. Gas particles only exert rejection towards others. The main issue is that natural particles could exert attraction or rejection during an interaction: they don't only exert rejection. Water molecules, several fundamental particles or simply magnetized particles create attraction forces when they interact. And that is not an isolated natural behavior, it is a very common one.
In consequence, whatever the concept of entropy is, the second law only expresses a circular reasoning idea: On systems that tend to dissipation, dissipation is more probable. True, but stupid, because on systems that tend to organization, dissipation is less probable along time.
Let's take the case of magnetized particles (as several natural particles behave) inside an isolated space: after some small time, particles will group.
If entropy=chaos, entropy decreases with time.
If entropy=membership of a small group of states [see: Daniel Styer, insight into entropy], then, entropy also tends to decrease: small groups happen more often.
If entropy=energy dissipation, the same. If particles exert rejection towards others, entropy grows with time. If particles exert attraction, entropy decreases with time. In addition, energy is a subjective concept. An object that is heat for a subject (and therefore can exert work) can be cold for another (not being able to exert work), so energy dissipation becomes a subjective approach.
In final terms, the root problem of the 2nd law is this: it formulates a law that is applicable only to systems that follow that law.
So, can the 2nd law of thermodynamics be a circular argument?