Do not fight the negative, however you perceive it. Do not fight with negative thoughts or emotions. Do not fight with negative people. What you resist persists. If you fight something then you are feeding it your energy. It is unwise to enter such a struggle.
The truly wise person seeks joyful growth not conflict. If you are fighting with reality then simply stop and withdraw your focus and find something more worthwhile to contend with. Of course your negative thinking will simply wither if you stop feeding it. And your negative opponent will not like the fact that you stop showing up. They will no doubt conclude that you are no fun at all and are no longer worth playing with.