Anecdotaly, I find Google Ads hard to use despite their market dominance.

I have been trying to recruit participants for my academic observational health study. My ads get incorrectly flagged as clinical trials and there seems to be no way to reach anyone who could override it. I also wanted to use a specific advertising strategy, which is only available via Google's poorly documented desktop software. Facebook Ads, while far from ideal, are much easier to set up.