I hatel the ruff sound especially when cold,
I hate expensive repairs when the fancy injection system goes wrong,
I hate the narrow power band,
I hate how tons of torque kill your drivetrain but you're still not moving forward because its only there between 2500 and 2510 rpm
I hate that most of them are absolutely useless under 1500 rpm so you still have to shift as much as in a petrol 4-cylinder car.
I hate the exhaust smell,
hell I even hate how the oil looks like after a few hundred miles.