It won't surprise you that I've got no political liking for the Lib Dems and the Greens, and obviously I know you've got no liking for Reform UK, but I agree with your point that we need to get away from two-party domination because both of the two 'major' parties are now so hopelessly compromised that neither comes close to representing the core right or left-wing ideologies they're supposed to represent.
The Conservatives are no longer conservative and Labour are no longer socialist. Neither offer the public any real choice or any prospect of genuine change. That's not to say there aren't still politicians within those two parties who remain consistent and true to their principles, but they're getting fewer, increasingly overrun by young, ambitious, but vacuous career politicians who have no real life experience or core values. They're happy to play within the ever more narrow tram lines of mainstream political debate, changing their shape and message in a heartbeat if they think it will move them more quickly up the political ladder.
We have an electoral system designed to make it almost impossible for any party other than the Conservatives or Labour to make serious inroads, and that's why, to use George Galloway's phrase, the public are currently being asked to choose between two cheeks of the same backside. At the next General Election the pendulum (such as it is!) will swing again and the public will no doubt make the 'prescribed' switch - with no particular enthusiasm - to something masquerading as the left cheek, but it won't materially change or improves their lives to any significant degree.
For anything to really change, something needs to break the mainstream political cycle, and I'm (almost) past the point of caring whether that disruption comes from an authentic right or left-wing party, as long as it comes from somewhere. The real political battle now isn't the fake choice between Conservatives and Labour, but the one to break the the current political control system in its entirety and give power and genuine choice back to the people.
Various smaller parties have attempted to challenge the Conservative/Labour hegemony before and ultimately fallen victim to the electoral system, but given that the public will inevitably continue to be offered no real choice at all by the 'big two', the hope must be that what is currently manifesting as public apathy will eventually turn to realisation and then anger, sufficient to create a situation where the two parties, and the electoral system that protects them, are replaced.