These are all problematic statements.

- CNN doesn't do polling, they have firms do that

- All reputable firms try get valid results, they have professionals, they know who they are talking to and the limits. What we see in the last 2-3 weeks of the elections are the polls they want to release however, those that err in one direction or another.

- They definitely accommodate for misrepresentation samples - if more of their respondents indicate 'registered republicans' than in the general public they will adjust.

- It's very hard to measure 1) the people that are hard to reach and statistically more likely to not trust pollsters and 2) likelihood of actual voting aka enthusiasm.

- there are plenty of centrist institutions and pollsters

- It's fair to call out Elon because he's making the policies

Twitter is just a bad way to measure anything except for the Zeitgeist of Twitter readers.