For entrepreneurs, the monopolistic stranglehold these companies have, make them impossible to beat with a better product. The best possible outcome is acquisition. You may join, but never beat them.
For Free Software hackers, the giants turning away from open standards, and towards DRM and abuse of the CFAA, is chilling.
For a free society, surveillance capitalism needs to die.
If you have ambitions in life beyond RSUs and a regular massage, yes they are too powerful.