No survey is ever anonymous no matter what they say and even worse if you provide feedback voluntarily.
You are doing their jobs for them or at least giving them information so they can use against you when it's time.
They've we-ponized the survey and communication channel. When was the last time anything from the survey actually make a real difference besides the lip service for the scores improvements that don't reflect reality.
We provided feedback that we have too many VPs and the org needs to be flattened out, starting at the upper middle mgmt, and they did the opposite by getting rid of people that do the work instead of the pass through upper mgmt.
We asked for more transparency, trust, and a collaborative environment for a more productive and supporting culture and they did the opposite, politicizing all decision making, promoting yes people, making people go to many long "culture" re-education camp meetings to drill into us that they know best what the culture should be.
This is why trust is gone and the surveys will never reflect anything real.