What are your thoughts on the ending of 20,000 Leagues Under the Sea?

I read this book with great hope, yes it was a really long book. Also, I think this book is a very popular book that everyone knows. I had good thoughts while reading this book, but the ending did not end as I wanted and also, you cannot finish a 500-page book by writing only a 2-page ending, the author should not have finished it. That’s why I want to hear your thoughts about the last part of the book.

by _G_o_r_k_e_m_