It's important to mention that catching COVID also causes myocarditis https://www.cdc.gov/mmwr/volumes/70/wr/mm7035e5.htm Edit: this article says out of 192 405 448 people, 1626 had myocarditis, or about 0.0008%. In contrast, the CDC estimates COVID has a 0.146% chance to give you myocarditis.
It's also true that VAERS may be underreporting cases.
Personally I know someone who had a heart attack 3 day after second dose (60yo female) The doctor dismissed the possibility of a causation by the vaccine, this case is not reported even if the person almost died.
Is covid still worse than the vaccine with Omicron, I don’t know, probable. But I know that most side effect are not reported.
A crazy thing is that the Myocardis rate can be reduce 3X by a 2 second procedure at vaccination (verifying that the injection is not in a vein)