Is Greece overrated

Generally yes, Greece is overrated with the exception of Thebes IMO.

Athens is seen as the model for the Democracy, yet the Democratic period of Athens that is celebrated only lasted about a century and is fundamentally different than the republic system that is considered a government today. Athens democracy was also limited to free men.

Athens also has the benefit of having written a large share of preceding world history through Herodotus and Thucydides. This isn't even a matter of the winners writing history, Athens was not a winner, it's a matter of whoever's story is written down writes history. But yeah Athens is celebrated for a large share of Peloponnese War era intellects that are seen as the West's intellectual tradition, but other major peer states like Corinith, Syracuse and Thebes(any of which you can argue are as successful as Athens) even empires as late as Carthage just don't have the sources for us to know if they have any counterparts.

Sparta's warrior culture has been romanticized. In reality Sparta was one of the most inefficient human society's in world history and their limited success was a miracle. Sparta made every function in their society other than war and motherhood dependent on slaves who they systemically murdered and also killed the children not capable of serving in warriors roles. Sparta thus couldn't move their small army far without fear of revolt. Sparta was dependent on the Peloponnese League of allied neighbor city states to supplement it's own troops and in the Peloponesian War itself was dependent on the Persians(who hated the Athenians more than Greece generally), financing and building them a navy which the Spartans used to defeat the Athenian one. In the education system they and Athens were taught as a package deal, and comparing and contrasting them got much more attention than many other more deserving historical topic. Peloponesian War was seen by my teachers as more worthy of covering than the Hundred Years War, Thirty Years War, Spanish Succession, European Seven Years War even the Napoleonic Wars. In terms of popular culture I would blame it on movies and horrible quality documentary's about Thermopylae that portray the slave owning Spartans as the defenders of Western freedom against the Persians whose religion condemned slavery("we are free men here").

Alexander I'd say is overrated and the Diadochi underrated. I think the only figure from the Diadochi or their dynasties most people even have heard of is Cleopatra VII. Alexander's empire was huge but most of it was the conquest of one other huge empire, Alexander also didn't physically conquer the whole empire, he defeated the Persian King in Mesopotamia which led to the empire falling apart(which is why Macedon is smaller at it's peak than Persia). The empire is also portrayed as falling apart after Alexander's death, not so much, Seleucus took over most of the Persian Empire and while Egypt and Greece were never reunited with the Seleucid Empire, the Achaemenid's hadn't been able to take Greece either and while they'd taken Egypt twice Egypt had also successfully revolted.

So those are my points here's my thoughts on yours

A agreed, just look at Persia.

B The Romans to be fair were influenced by the Greeks after the Romans conquered them, taking their religion among other things but generally agree. Religious merging wasn't new anyway and the conqueror taking on the conquered's religion or the conquered's reconciling their religion with the conqueror are very common theme's in history regardless of region.

C Athens wasn't the precedent for the Roman Republic, the Athenian Democracy and Roman Republic were founded at around the exact same time, but the Roman Republic was founded first(by like a year). But yeah if you want a democracy build a democracy, I wonder if Italian Republics were more inspired by the Italian Republic that lasted 500 years and took over several major civs or the democracy that lasted one hundred years and built their limited success by stealing all of their weaker friends money.

D Yeah agree strongly, especially in terms of science and medicine. While I agree Aristotle's take on education and knowledge, the man was wrong on so much science. Hippocrates was revolutionary for the time for separating medicine from religion but impact on modern medicine(besides the oath which again is more philosophy).

E This is very obviously true for almost every person who is alive today.

F I agree to an extent. Aristotle's philosophy can teach us a lot, Plato started universities and Hippocrates oath is morally superior than many people in my country today but Socrates is only impactful on modern education because we choose very stupidly to let him be.