The Labour party in general are destroying their own relevance by actively alienating the majority viewpoint of their membership. You may not like Corbyn, but the parties willingness to ignore the democratic views of their members and even try to exclude many from voting for the sole reason of who they support is fecking shocking.
The thing is that this is largely self-fulfilling. I don't think Corbyn's particularly skilled or talented politically, but he's quite clearly what the members want, and as a result the party should've tried to make it work. They haven't done so, though. They've worked to undermine him from day one, to say, "See! See! We were right." And now, they've discovered that it still isn't working, and that people still want Corbyn in charge.
It also shows a basic lack of taking responsibility. Last year it was the fault of the SNP for the Tories getting in. Now, it's the fault of Corbyn voters. When are Labour going to take some fecking responsibility? When are those trying to orchestrate, and those supporting, the coup, going to recognise that all of their plans have completely failed, that they are actively undermining the membership, and that their inability to get into power is not because of the SNP, or Corbyn, or anyone else...and due to the fact that they're not only unable to convince the country that they're best for government, but that they're also unable to convince even the fecking party that they are?