i hear ya. that's a valid concern. however, the cia also uses tor to protect their own online traffic, so i feel it is most likely that the us gov is funding tor's development while simultaneously trying to break it.
i am a big proponent of whonix on qubes, and tor has served many people well (myself included) for many years not to mention, Ed Snowden.
i take the approach of always assuming compromise and then mitigating risk. no tool is impenetrable, all have their strengths and limitations. and, i feel tor is a significant bolster for infosec best practices and one of the best tools for the open web and privacy that we've ever had