I've seen people say this elsewhere it's just not true. My eye test on the first three games saw the issue as Huerter and Keegan getting open looks and just not hitting them. I haven't found published individual stats, but our team 3 point stats bear it out
The Kings have had 24 wide open 3 point shots per game and are shooting 26% on those attempts. That's the most wide open 3 point attempts of any team in the playoffs this year, and we're converting at the lowest rate in the league. We were hitting those shots at 39% in the regular season
https://www.nba.com/stats/teams/shots-closest-defender-10?CloseDefDistRange=6+ Feet - Wide Open&SeasonType=Regular Season&dir=D&sort=FG3_PCT
The fact that we're leading in open 3s by a relatively wide margin - appx 10 more open 3PA per game than median team - and that those looks are going to 40% shooters shows pretty clearly the Warriors are actually playing pretty horrible 3 point defense. They've done a good job in the interior on Domas as well as being aggressive gambling and forcing turnovers but they haven't been able to stop our shooters from getting open looks at all