Why the dark and sad episode?

Rating: 1/10 (23 April 2017)

I am a fan of the X-Men movies. They are all fun and exciting to watch. They are also beautiful to see. This is not true for Logan. Sadly.
The movie isn't fun, the surroundings are sad. The same for the characters. To see beloved heroes turn into decadent sad characters is awful.
They do die has heroes. But very broken ones.
Other characters are poorly written.
And I got the felling, at the end, that the "bad guys" were stronger, even if the mutant children got away. With the death of Logan, they run away into the woods, scared.
No teacher left behind to guide them and teach them to manage their abilities and hopefully save the world.
No. They are left alone in a dark world. Their hero was a drunken sad Logan, that didn't taught anything positive.
Sad, sad, sad. And ugly.