1. Uber has a track record of noncompliance
2. You don't want to invest in them because of #1
3. Enron also picked a fight with CPUC
So responding to each point:
1. True, and they probably should be fined for the late report, but as a public entity you can't go fining people exorbitant fees due to unrelated actions. For example, if I made some public bigoted remarks and then a police officer caught me littering they can't just go fining me 20x the normal fee because of what I said. CPUC should evaluate the fee solely on the basis of the infraction that caused the fine in the first place.
2. While I don't disagree with you, this is irrelevant to this discussion. Perhaps it belongs it its own comment thread?
3. This seems similarly irrelevant to this comment thread. A better comparison would be how much Enron got fined for a similar offense against the CPUC.