Of all the things you could critique DSA on, this is the hill you're going to die on? 
DSA deciding to do a mask mandate at this event is unequivocally good and based. Shut the fuck up, you fucking dipshits.
Imagine being this much of a fucking goddamn crybaby about masking. Eat shit, you ableist fucks.
One of the biggest lessons this pandemic has taught me is the astounding number of people for whom leftism is really just performative, and that when push comes to shove, these people will make the biggest fucking stink about having to do something even mildly inconvenient for even a single fucking event or context and show themselves for who they really are.
well you're talking about people who attends DSA convention, only a few true leftists will be there, most are Berniecrats.
The new elected majority to the NPC (highest body in the org) are of the left/marxist side of the DSA. Now of those you have a lot of neokautskyists and the like but they deserve a little more credit than berniecrats.
does that mean a hard break from the democratic party is more likely to happen?
More likely than before, but like long term; definitely not within the next 2 years. I think this convention was a swing in the direction of people who want a clean/hard break but I don't think it's going to happen anytime soon.
neokautskyists? Thats even worse. Ignorance by choice is worse than ignorance due to inexperience.
I honestly don't know a whole lot about neokauts (I think they are also pro-lenin? Whatever the politics of cosmonaut magazine are) but from what I have seen the organizational strategies they'll push for are much better than that of "berniecrats".
If this was about Marxist Unity, calling them Neo-kauts is kinda unfair to them. It's more like "Kautsky's writings have things we could learn from, but he was a renegade and Lenin was right about him." They've explicitly said this.
Fwiw I only refer them as neokauts because I see a lot of them identify as such on twitter. But yeah I looked up their onboarding school and they make their members read more lenin than they do kautsky. That might be too revisionist for some people here's taste but I think them, red star, and even b&r making up a left-majority steering committee is a good thing.