Button recently claimed the car this year has not suited him as well as in 2010 and 2011, underlined by the fact he is poised to end with his lowest points total in his three years with the team.
Despite the high of starting the season with a win in Australia, the 32-year-old then ran into tyre issues that were the over-riding factor in a run which saw him claim seven points in six races.
By the time a solution was found, Button's hopes of the title had all but evaporated, leaving him chasing nothing more than respectability which has still been hard to come by.
Button can only hope with two races remaining, in the United States tomorrow and in Brazil next weekend, he and the team can work on a plan going forward to carry them through the winter and into pre-season when they can start with a clean slate.
"This season I've had the high of winning two races, especially at Spa (Belgian Grand Prix) because I love it as a circuit," said Button.
"I'd had some great races at Spa before that, but I'd never won, so the one there this year was a very special victory.
"As for the lows, they were around Monaco, Canada time, circuits that were so good for me last year but weren't good this year.
"The last two races (in India and Abu Dhabi) have not been spectacular either. I haven't felt the pace in the car and struggled to get a balance.
"The team and I have worked well together, but there is something that is not working for me with the car.
"I pretty much know what it is, so it's something we can work on for the next two races, and definitely through to next year."
Button admits he expected to be in the running for the title in the wake of McLaren's strong pre-season and his win in Melbourne.
The problems he has encountered with the Pirelli rubber, however, caught him by surprise and were a reminder of his time at Brawn GP when he only just held on to claim the title in 2009.
"I was optimistic after Australia - I normally am after winning races. I thought I was going to win them all after Spa as well," said Button.
"I was actually very optimistic as the car had felt great all winter.
"In qualifying it was really good, and the race was perfect, but I didn't expect to have the issues we did with tyres.
"It was not so much a degradation issue, of pushing the tyre too hard, the problem was getting it in a working range.
"That is normally a bad area for me, and the problem I had at Brawn when I won my championship, so a lot of the year I've struggled with that and is something we need to continue to work on."