I follow the Warriors very closely for personal reasons and have watched more Ws games than Blazers games the last 4 years, both in person and on tv.
That being said, right now, and over the last few seasons, I do not think anyone beats them in a series. Yes, Cleveland did. It was also 3-1 GSW before Draymond got suspended and everything fell apart. This could be 4/4 the last four years which is incredible. You get the feeling when Golden State has a problem with a team or in a series, its more about them, not the opponent.
To beat them you have to not just play really well, you will need them to be off. You have to have excellent, physical defense on the perimeter. Strong and tough guys who play aggressive defensive and don't require a ton of help. You need length to rebound defensively - giving them one shot is already too much. Giving them two or three is literally impossible to counter. It would help to have a very long defender who can at least stay with Durant. I can think of maybe one guy, Anthony Davis. Defensively, its a gutting feeling knowing that they have 4 all stars, three of them are three of the most elite shooters of all time, and scorers of all time in two of them. In other words...half of them can have off games and you are still left with two future HOFers to deal with. That aint normal.
I thought two years ago that if you took emotion out of the equation, Portland would probably be best off unloading everyone for picks, like Philly, because there is little chance anyone dethrones GS between 2014-2020, let alone Portland. They could build to peak in 2020, and beyond, when the Warriors dynasty is over.