Since Delta, the efficacy of the vaccine has been in doubt. It seems to be completely worthless against infection with Omicron (and despite claims otherwise from both sides, there isn't enough data yet to determine whether it works against serious disease with Omicron). The booster is a scam; you're boosting your levels of antibodies with very poor affinities to current variants, but since antibody levels decay exponentially, you won't get those high levels for long, so the booster advantage will fade quickly.

Huh, finally someone I agree with.

As for the antibodies after the booster, it seems that initial levels of antibodies are a bit higher than after the second dose, so that may be a sign of hope for those who are at risk.