The following graph shows average perceived political biases of the major social media platforms by the public, computed by taking the percentages of each group who perceive social media as having a leftist bias and subtracting from that the percentages who perceive it having a rightist bias. Positive numbers thus indicate perceived liberal bias, negative numbers perceived conservative bias:
The social media giants are perceived to be calibrated precisely at the center of the Democrat distribution. Perspicacious public. Big Tech wanted Kamala Harris, not Bernie Sanders, after all.