Yes, both parties suck, and you are allowed to dislike both, but they don't suck equally and not (completely) in the same way and you are obliged to decide for yourself which party sucks harder, which you dislike more, and most importantly - which are you the most scared of getting into power.
Just because you don't want to be neither leftist nor rightist doesn't mean you need to aim for the dead center. That's as dogmatic as aiming for one of the extremes, and in fact dumber because it's not even motivated by any ideology.