You know the anarchist group I'm part of had people like you join from time to time that seem more interested in reading, purity testing and just calling other members "bad lefties" instead of taking part in local politics which is our main goal. Calling me unserious while complaining about definitions takes the cake though.
You seem to have misread it more. Yes, parties were banned but so were factions in the bolshevik party, elected city soviets and pretty much all groups outside the party. Meaningful elections happened only inside the party, the elections everyone took part in were for show, they gave no control to the workers. It's all in that source.
If you are interested in how elections were run in the USSR this is pretty much how I remember: https://en.m.wikipedia.org/wiki/Elections_in_the_Soviet_Union
From what I remember the candidates you could actually vote for were party picks that would do the same thing anyways so your vote was merely symbolic. Over time people cought on to that and voter turnout crashed so hard the party started handing out exotic fruit to people who show up, I got my first orange that way.
Pat Sloan probably took part in an election before Stalin, as I previously said, the election process after Lenin was very different. So, yea one dissenting historian.