Only effective product boycott I know of was from when I was a kid. Nestle was selling baby formula as healthier-than-breast milk to mothers in poorer countries.
But the baby formula was very expensive so they’d water it down, figuring that it’s STILL healthier than breast milk.
Anyway, it was bad.
So, churches in the USA and Europe all got together and started mass boycotting Nestle products until legislation changed in various countries.
It worked. That was in the 1970s and I was too small to remember.
But it’s the only truly effective product boycott story I know of.
That said, if you want to boycott something, go for it. I didn’t mind that beer but now, I’ll just skip past it and get an IPA or something. Beer company going into politics is stupid.