Actually I found the solution myself literally ONE year after. 
The only problem with this is that if you don’t have a wheel, this makes things unplayable for you, because what is happening is that YOUR casual arcade gearbox settings with all kinds of assists and all that translate to other players, so when someone uses the clutch pedal for anything else other than flat shifting 0 to 100% depression, you are going to see people smoking, because on YOUR end people locked their engines.
But anyway, if you have a wheel, go ahead and do this:
In the settings see Gameplay > Vehicle Behaviour > Default Ignition State, set it to ON, or running.
Then look for assists, there should be Gearbox safety, Throttle and Clutch assists, turn them OFF.
Many thanks, be well and big ups! 