You did not provide sources. There are facts that they existed, and differing opinions on the extent to which workers controlled the Means of Production. The elections did not disappear under Stalin, opposition parties were banned. This means it was flawed, but ultimately still existed, which is my point.
You cannot say that the Means of Production were state owned, and elections regularly practiced, and still say it was not Socialist. We are not arguing with whether or not the USSR was Socialist, but its effectiveness in carrying out the will of the Working Class. That much is obviously not 100%, the party was corrupt, you will not find pushback from me there, but it was Socialist.
You are arguing off of vibes.
The Communist Party was fundamentally not a new class. They did not own the Means of Production any more than the average worker, any worker could join, and the party was massive. A royal family would have engaged in feudalism, but that wasn't the case.