I know what ye mean mate people like that try to pull other people down because they arent happy or feel good about themselfs & they feel threatend by people who have a goal in life so they try to destory that persons goal by trying to pull them down. But your right people like that make you more determined in reaching your goal so in a way you can thank them by saying thank you your hate & bitterness made me more determined. It does piss you off as I have had to put up with idiots like that in jobs in the past but it's best to ignore them & let them get on with it at the end of the day you will get the last laugh!