"quietly beat the crap out of it with a 3 pound lump hammer!"
I had a washing machine that had frustrated many an engineer while still under warranty, but they did manage to get it working for long enough that the warranty had well and truly expired.
The next time it broke down I had a plan ready.
It still looked immaculate, so there was the danger that some enterprising soul would try to resurrect it, if I tipped it in one piece, and then suffer the same way I had.
I stripped the thing down and spread the parts around various tips, to minimise the chances of someone doing that.
No rage, instead cool calculating satisfaction that I had rid the world of such a troublesome piece of kit.