When the party inevitably explodes due to internal bickering and/or simply failing to deliver their impossible promises, a new Messiah pops up, propped by the national media, and the cycle restarts.
That being said, the other 80% is somewhat consistent in their patterns.
The issue is that farage and boris have personality, and understand how the media works. Nobody else apart from blair does(possibly the ham toucher too.)
The Farage style parties fail because they are built around the cult of the leader, rather than the joint purpose of changing something. This is part of the reason why I'm not that hopeful about Starmer, as I'm not acutally sure what he stands for, so how are his ministers going to implement a policy based on bland soup?
The problem is that the election before last was a protest vote to keep the incumbents out at the expense of actual Governance - with thoroughly unsuitable Sinn Fein candidates elected as protest votes for 1st preferences, and by transfers in marginal rural constituencies thereafter.
https://www.theguardian.com/world/2020/feb/09/irish-voters-h...
Note that Sinn Fein is the political wing of the IRA and would be almost unheard of to hold any sort of meaningful majority in the Republic - but have garnered young peoples support in recent years based on fiscal fantasies of free housing and taxing high-earners even more.
This protest vote was aimed almost entirely at (rightly) destroying the influence of the Labour Party and the Greens due to successive unpopular taxes and DIE initiatives seen as self-aggrandizing and out of touch with their voting base. It saw first-timers, students, and even people on Holiday during the election get elected for Sinn Fein.
Fast-forward to today, and it quickly became evident what a disaster this was. Taking away those seats from Sinn Fein meant redistributing them elsewhere - and given the choices are basically AntiAusterityAlliance/PeopleBeforeProfit on the far-left, and a number of wildly racist and ethnonationalists like the NationalParty on the far-right, the electorate voted in force to bring in both 'moderate' incumbents on a damage-limitation basis.
https://www.politico.eu/article/irelands-elections-european-...
Tony Blair said at the 1996 Labour Part Conference:
> Power without principle is barren, but principle without power is futile
Starmer is a poor copy of Blair. None of them stand for anything. They say things that pleases enough people so they get elected, then they attempt to enact what they really want to do.
> The Farage style parties fail because they are built around the cult of the leader, rather than the joint purpose of changing something.
There is certainly that. However there are interviews with former Reform / UKIP members that held important positions in both parties. Some of said that Nigel Farage sabotages the party just when they are getting to the point where they could actually be a threat. Which leads some people to think that Nigel Farage is more of a pressure valve. I've not seen any proof of it presented, but it is plausible.
Saying that though, most of the candidates for other parties (not Labour / Conservative) are essentially the people that probably would have no cut it as a candidate in Conservative or Labour parties.
He succeeded with UKIP as the goal was Brexit. He then left that single issue party, as it had served it's purpose and now recently started a second one seeing an opportunity.