The CLP is neither unpopular nor incompetent. And by and large, no party expresses in practice a 100 percent purity towards their basic doctrinal tendencies.
These are mostly the kinds of things you'll see in the next thread, post WW2, but the UASR is a fairly dynamic multiparty system with shifting alliances, and parties taking pragmatic stances that occasionally seem dissonant with core ideological commitments.
To put this in perspective, every single governing coalition until at least the year 2000 involved either Liberation or the CLP, and in nearly all cases they were the senior partner. There is an unspoken commitment to ensure that the scions of the old Workers' Party set the overton window, and on at least one occasion they have formed a grand coalition to discipline the DFLP for making alliances and policy that they felt compromised the integrity of the workers' republic.
They do have real, sincere political differences based on core commitments to Marxism, as well as more prosaic power conflicts. The CLP believes, with some justification, that Liberation's practice of free-wheeling councilism and libertinism have lead to making short-sighted policy that strengthened market and property relations. That in effect, Liberation's distrust of centralized state management, but inability to fundamentally abolish the value-form leads to a politics of worker self-exploitation. Syndicalism and councilism have in practice results in the maintenance of market relations, and thus alienation and exploitation continue under different forms.
Sometimes they're right. The state's involvement can sometimes create a more just situation. In the CLP's vision, no one gets left behind. They also are, on the other hand, forced to accept some level of bureaucratic deformation and inefficiency that comes with centralism, and a sometimes uncomfortable relationship towards state power. But they're also the Party that will, historically, abolish the death penalty for civilian crimes because sometimes only Nixon can go to China.
We're dealing with political factions in a socio-economic formation that has never existed in a mature form before, so I'm hesistant as an author and theoretician to make any one faction right. They all have their flaws. The True Democrats are consistent advocates for liberty...and a party riddled with every sort of reactionary. The DRP are right that at certain tech levels markets just work better. But they're also advancing policies that will enrich themselves and their core electorate at others' expense. The DFLP can be slaves to opinion polling on a lot of issues, and the ones that they aren't slaves to, like women's issues, minority rights, the family: they'll often be decidedly on the wrong side of history on them. The CLP's flaws have already been discussed more at length; Liberation has the same inherent problems that modern day right-libertarians have. They're simultaneously in-favor of decentralization and personal liberty...and yet are hyper-militarist and often cannot see the dissonance and perils caused by those values. The SEU are often filled with New Age Woo, and some crankery, and by present they will have fallen far from Bookchin's light, and the party in practice quickly lose touch with its radical roots and inadvertantly derail the transition towards higher stage communism.