Leicester City finished the season with a double digit lead at the top of the table.
The Midlands club capped their incredible campaign with a 1-1 draw at previous champions Chelsea, and Drinkwater told reporters how fulfilling it is to prove people wrong.
"Madness," he said. "If you'd said that at the start of the season everyone would be saying 'no chance'. But we've proved a hell of a lot of people wrong."
Claudio Ranieri's men only lost three games all season, and finished the campaign 10 points clear of their nearest challengers Arsenal. Drinkwater hailed his side's resilience, highlighting the importance of their fans' support both home and away.
"Importantly, we continued on this unbeaten run, which was perfect," he said. "We've lost three games this season, which is a reflection on how well we've done as a team. Home and away the fans have been brilliant. They've had a lot to cheer about. Credit to them, they backed us all the way."
The challenge for the Foxes will be maintaining their superb form for next season, as they will now be considered a big scalp by other Premier League clubs.
Although Ranieri is likely to strengthen his squad in the summer, his priority will be to keep hold of his current crop of stars. The likes of N'Golo Kanté and Riyad Mahrez are rumoured targets for numerous high profile clubs, and the loss of players of that calibre would certainly weaken the Foxes' squad, irrelevant of who they bring in.
The team spirit and togetherness is what has made Leicester great this season, and that has been exemplified by the performances of Drinkwater.
The 26-year-old has just had the icing put on the cake of what has been a fantastic season, by being named in Roy Hodgson's provisional England squad for Euro 2016.