T-rump has a less than 40% approval rating. He's already lost key components he promised to accomplish, e.g. repeal Obummercare. He's had to remove key staff. e.g. Bannon, Manafort, and Flynn. He's got all three branches of gov't on his side and still is flailing. The wall isn't going to happen. He's breaking lots of promises he made to his base. Protest may be slow progress but it's already accomplished lots. 

As Edmund Burke said, ~"All that is necessary for evil men to triumph is for good men to do nothing." The tide is already turning. Trump will be impeached before his first term is up, or be assassinated. He knows if he really changed anything he'd be dead overnight, hence his reversal on so many key promises. 

The importance of protest, even if it seems futile at the present, is that it encourages others to do the same, or at least to speak out at work, in church or around the dinner table. Revolutions are not made overnight.

"Fear not, and stay active." -- Ba'hai saying