[caprock]

I generally agree with the tactics suggested here by zer0.

Make your manager aware, so they start paying closer attention, but be wary of asking them to act for you as you don't know what they might do to make things worse. They don't sound like a good manager in terms of managing social cohesion.

Then, start experimenting with tactics to interrupt these problem folks and get them back on track to clearer, group oriented communication. What often happens in these scenarios is many people are quietly tired of it just like you. If you gently and politely push back, you'll soon find the other voices come alive to help and join in. It might take a few weeks.

Also, I don't think I'd take the risk of running into similar problem people at a new job for a guaranteed pay decrease.