I won't comment on Snowden since there are significant efforts to continue his cause, and his whistleblowing is one part of a backlash against the overreach of US government surveillance.
The cellphone meta data issue is complicated by the fact that the telecommunications infrastructure of the US is not private and only recently regulated. New industries with antiquated interpretations of law are bound to be abused by those anxious to expand their power, but I trust that the American civic process will overturn such abuses of power within a reasonable time frame. Rome was not built within a day.
Border controls are also a separate issue - it is our current understanding that the federal government has both the power and mandate to exercise significant controls at the border, and several rights outlined within the Constitution are not exercisable at border crossings. Furthermore, American citizens can never be denied entry, only delayed, so citizens can always deny information requests. Stupid usages of our interpretation of the Constitution, such as asking for access to social media accounts or electronic devices, are technically legal. But social media information have no expectation of privacy, and again access to accounts and devices can always be denied. Recent efforts by advocacy groups are also seeking to overturn this overreach of power by some foolish officials within the CBP. Another case of the law not catching up with technology.
To the point of global corporations, I'm not saying that they are benevolent or disinterested in maintaining power. Nor am I suggesting that American companies do not turn over information to the government, or misuse the information they collect. But they are private bodies. Just as citizens can perform crimes and ethically bankrupt actions, so can companies. But they don't adhere to an overarching ideology, nor do they claim to represent the will of a people. Google mucking around in America and Europe alike may be tolerated, or punished. Tencent and WeChat is different because of their entanglement with the Chinese government, and should be treated differently.
Overall, if America begins to halt Chinese influence on American citizens, and China continues to do so for its own citizens, there is at least some degree of "protection" of individual rights. This would be the foundation for protection of individual rights between any government and any individual.