Sorry, but not the best Marvel movie ever.....

Rating: 7/10 (6 April 2019)

Does it have the aspects of all great Marvel movies? Yes. It has the stunning visuals, amazing CGI, near-perfect soundtrack, and a well put together cast.
Is it the best Marvel movie ever? No. It took 18 movies for Marvel to set up the MCU to get to a point to actually make this. If they had tried to make it in Phase 2 or 3 of the Infinity Saga (aka after The Avengers or Avengers: Age of Ultron), it may not have been the success it was. Black Panther, although a key Avengers member, is not necessarily the most well known comic character.
Like the rest, it does have flaws. Some of which are major. Killmonger is a little too over-zealous to make him supportable. Some characters aren't developed enough, even though they do show up in Infinity War later on. And the flashback scenes don't explain enough.
It probably got a little over-hyped because it was the first minority superhero blockbuster (although Wesley Snipes' Blade trilogy was the first minority Marvel hero film). Marvel is working on a more diverse, inclusive film slate, which will bring about a new era. And may get those who aren't "nerds" into the theaters.