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Fernando Alonso believes his cutting criticism of McLaren's Honda engine was necessary to ensure the company accepted that huge changes were needed.
The Spaniard called the engine "embarrassing" after the Japanese GP while he said he felt like an "amateur" when repeatedly overtaken in Canada.
The entire season was a disaster - McLaren's worst in their illustrious history - with uncompetitive displays, reliability problems and grid penalties for team mistakes featuring throughout.
Honda's engine was by far the worst on the grid and Alonso thinks the necessary changes will now happen.
"The actions we need to take next year to be competitive [are] quite extreme," he said.
"For big problems you need big solutions, and I think maybe that helped a bit for the big solutions.
"A lot of radio messages they didn't broadcast, a lot of in-laps where we were very thankful of the team because it was very difficult.
"Sometimes they change three engines, we were taking one point, two point, close to the points. A lot of positive messages they never broadcast. In Japan, when they broadcast that, probably I knew they could broadcast it.
"I don't think it was the best of me," he continued. "I had some good races but here and there not consistent enough.
"In Suzuka, one of the best (of the season)," Alonso said. "In Austin, it was one of the best - for the first 20 laps in the damp conditions, eight or nine of them I was quicker than Lewis (Hamilton), who was leading the race.
"But I could not keep that top level of performance consistently enough.
"Sometimes because of the lack of laps, sometimes because of mechanical problems, sometimes in the fights we are quick in the corner and very slow on the straight so you cannot maximise the pace in any of the parts of the race.
"Some frustration around, some disappointment sometimes. So for next year the level will be higher and I will perform as I did in the lap in Japan or the race in Austin hopefully in every race in every lap."
"So some frustration, some disappointment, so for next year the level will be higher and I will perform as I did in the lap in Japan or the race in Austin every race."