Yes, getting better for sure.
I see what you mean about satisfaction...
The satisfaction in revenge is only enjoyed by Dantès himself,regardless of whether the revenge was taken to its wanted maxima or it went too far.
So, your main point is the fact that nobody else enjoyed the revenge? Is that really your main idea?
Oh... I just realized I am familiar with the story! Um... is it too obvious to observe that no one else enjoyed it other than him? Is that meaningful? If not, what is it that makes his vengeance meaningful and unique?
You can try this technique:
Write a paragraph about a scene, and discuss it thoughtfully.
Repeat that process for 5 paragraphs
Go back and write an intro with a thesis statement based on whatever observations you made while writing those paragraphs.
It is a great trick. :-)