I mean, read the article: Facebook has realized the same thing and that's why they are recommending their employees to not wear Facebook branded clothing.
Like it or not, the pool of disillusioned people is now much larger and I'm not particularly keen on learning what effects that will have down the road.
In a strong 2-party democracy voting against one party looks equivalent to voting for another, even though the intention is not.
Anyway tl;dr the US needs massive political reform and one should never be constrained to just two choices.
e.g.
https://en.wikipedia.org/wiki/2019_Conservative_Party_leader...
In contrast, US Presidents are elected with zero input from Congress and are often at odds with the House and/or Senate majority.
I'm not yet willing to predict mass violence but I will remind people that we had an opposition MP killed during the campaign for Brexit.
Same problems as the US. We have a two party state, which means very broad coalitions, no real choice, and a lot of unheard voices. Just like the US, we have suffered deindustrialisation as companies shipped production overseas, encouraged by our politicians, and those people who lost out have no way of fighting back. Their resentment has grown to the point where it is now finding expression through Brexit and populists like Nigel Farage and Boris Johnson.
Proportional representation provides a "release valve" for angry minorities, in that new parties can form. Some people think this is a danger, because they see those parties gaining some real power, but what usually happens is their supporters see the realities of political compromise, see some gains, at least feel represented, and the anger recedes.
The first place we're seeing the cracks is the UK leaving the EU whilst NI has not, and support for Scottish independence on the rise.
More pertinent to your reply: without a constitution the flexibility is simply exploited for party political gain, which often destabilises the country. Similarly, the trend has been in recent decades for the executive to increasingly take power away from parliament, which has proceeded unchecked. So some of us envy your constitution and the lack of gaming in e.g. the timing of elections. And let's not even get started on the "ceremonial" royal family...