Geeze. So there is no data that can be trusted.
There is, but you have to be aware of what that data is and where it comes from. In the case of VAERS, you have unverified data from unknown sources, often riddled with errors and/or missing information. It’s useful to researchers looking for patterns in the data that may indicate a problem, but it’s not a valid source for “X number of people have had Y problem because of the vaccine”. VAERS themselves tell you - explicitly - that the data in VAERS is not valid for that. For one, there’s no direct comparison within VAERS to the background rate for any given adverse event.
There’s research that happens outside of VAERS that establishes what issues are present. That’s how the J&J blood clots issue was found. That’s how the issues with anaphylaxis with Moderna and Pfizer were found. Each of those happens in the range of 1 in 90,000 - 1 in 400,000. Extremely rare events. The clotting issue in particular is difficult because it’s not like an immediate allergic reaction where you give the vaccine and 3 minutes later the patient is going into shock. So establishing cause-and-effect requires a lot of work.