There is a big difference between saying you like to play longer time controls and you choose to play longer time controls. I've taken a quick glance at your games and you handle 30 minute games the way you should handle a blitz or bullet game. Remember that your time is a resource that is available to you in games. Not using what is provided to you is unwise.
The first thing that you need to do is choose the right time control and adjust how you play so that you can be successful.
If you are going to choose to continue to play 30 minute games, you need to change your thinking process in how you choose your moves.
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I often like to play longer time formats such as 15 | 10 or 30 Minute Games however, I always find myself being too impulsive and impatient. I was wondering if there are anyways to stop this and help.