Grenfell. Police cuts. Fire cuts. NHS cuts. Oh and poor and black lives matter
This is exactly what I mean. You've also mentioned austerity, the election result, the DUP...I'm sure there will be other things too. It's just totally ineffective because it's an unfocused general umbrella movement for discontent where people turn up, get angry and go home. They never achieve anything because nobody is ever sure what exactly they want, just that they're angry about lots of stuff and they don't like it when people disagree with them.
What do you hope it will achieve? What do you think it will achieve? It's very unlikely it will result in a democratic vote being set aside. It's very, very unlikely to convert people to the cause. They probably won't even be very clear what the cause is.
It's counterproductive because a general protest about not getting your own way just makes you look like entitled bad losers. It's like a huge toddler tantrum.
Oh and getting personal weakens your own argument because it makes you look like you can't actually think of a decent argument so resort to insults instead.