Samsung watch 8 blood pressure measurement is absolutely mess

I suppose that my earlier Watch 7 and watch pro 5 (if I remember correctly) had better results. But Watch 8 readimgs is absolutely weird, thougb I recalibrate it twice a day... Evening pressure according to the machine is higher 20+ points, but Watch shows it like earlier measurement... Very disappointed, because there is no way to attune it. :(

It seems like dangerous for people with BP problems and not helpful.