Well deserved WDC by Hamilton, and awesome job from Mercedes team to fully focusing on him maximizing always their results even they didn't have the better car on track.
Shame on Ferrari on the other side, this year they showed the better technical package overall but they failed to use it in so many occasions, with silly strategic approaches (one above all the Q3 at Suzuka) and not deciding to use Raikkonen like Mercedes did with Bottas in full support of Vettel.
Vettel, very bad season from him, no excuses.
The SF71H has showed great potential, very often the fastest car, but the lack of cold blood on Q3 and in some close hot situations has caused him to throw away a ridiculous amount of points and race wins.
Raikkonen has done a decent job, but it hurts to see him in this bad shape, apart some exploits like Monza pole or COTA win, an overall anonymous season.
This makes Hamilton 5th WDC more deserved, as it's the one gained with a car usually not he fastest on track.
I think Vettel will suffer even more next year, with such a phenomenon like Leclerc as team mate, he'll have such a big pressure to stay in front of him that this might cause even a stronger meltdown than this year.
On the other side, Hamilton will be calm and sure he'll have the whole team and his trusted wingman on his side.