@Piruz I think that the intolerance to vapor you describe is something people who switch from smoking experience with cannabis as well. It's very common for new vapers to cough a lot, and feel the vapor to be harsh. People who continue to smoke while making the transition often have the hardest time.
Have you made a clean break, and tried to muscle through the irritation you're experiencing? Or are you still smoking?
If you're able to go without smoking you might find that harshness goes away after a week or two of exclusively vaping. Best of luck!
@GoldenBud this is not the thread for that. If people want to quit nicotine they can make that thread. This is for discussing vaping tobacco.