I think the biggest reason why Warriors are not playing like warriors anymore is that every team is going out there to win and show off they can beat warriors. If a team like warriors plays their hardest for 82 games a year and than playoffs two things will happen, first is injuries, you can't play at 100% for 82 games and playoffs for 5 years straight without hurting your body, second is fatigue, which they will eventually have.
So, they are just bored during the regular season and play it like it doesn't really matter to them that much, we are seeing Warriors at probably 50% right now and they are still better than everyone else, so they don't need to play pedal to the metal type of game anymore. However know that when it comes to playoffs they will fix themselves up and will play the best basketball they can and destroy anyone on their path for sure.
Yes I do believe you are right. Right now with roughly 12 games left of the regular season left every team even not in the playoff hunt are going after the warriors to show they are vunerable and do have a weakness afterall.
It is just like the raptors they have a target on their backs and everybody is out to get them.