Interesting survey. I notice there was about a quarter of respondents that are less trusting in traditional media due to COVID coverage. If that's based on the traditional media being countered by 'new media', which might be unfounded tweets, facebook posts etc it's almost more of a reflection of a loss of understanding on critical review of an article for bias, legitimacy etc.
Scientist changing recommendations when they learn more about a new thing isn't an indication of them lying; it's actually just a good sign that they are basing their recommendations on the best information available at the time. It's the people that stick to their original plan when new info comes up that really worries me, not people doing the best they can and making assumptions where they have to to work through complex problems.