Every leader knows the cost of toxic team dynamics. Whether it’s a snide remark in a meeting, a defensive comeback, or the dreaded silent treatment, these behaviours don’t just create tension, they erode trust and crush performance. Teams are living systems, like spider webs, where one tug affects the whole structure. That’s why a single negative behaviour can ripple across departments and derail momentum. But here’s the opportunity: eliminate the toxic waste, and you free up the energy your team needs to perform at its best.
The Four Team Toxins Killing Performance
Relationship researcher John Gottman identified four destructive behaviours so lethal he called them the Four Horsemen of the Apocalypse. In organisations, I call them the Four Team Toxins. They are:
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Blaming/Criticism – attacking the person rather than their behaviour.
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Defensiveness – refusing to take ownership and shifting blame.
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Contempt – sarcasm, cynicism, belittling, or hostile humour.
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Stonewalling – shutting down, withdrawing, or refusing to engage.
These behaviours may seem small in the moment, but repeated over time they destroy collaboration and stall performance. And let’s be real: you’ve used them, and you’ve felt them. The key is learning how to stop them before they poison your culture.
Why Toxic Behaviours Show Up
Here’s the uncomfortable truth: toxic behaviours usually stem from one thing — powerlessness. When people feel unheard, stuck, or frustrated, they default to criticism, contempt, defensiveness, or withdrawal. It’s rarely about being a “bad” team member. It’s about lacking the tools to handle conflict in healthier ways.
Four Antidotes to Team Toxins
If you want your team to thrive, you need to replace toxic behaviours with powerful alternatives. Here’s how:
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Name it – when toxins appear, call them out and commit to moving forward without them.
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Educate – show your team the impact of toxins, and even make spotting them part of the culture.
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Plan ahead – agree on how you’ll respond when these behaviours creep in.
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Provide alternatives – teach people to express frustration in constructive ways.
This isn’t about policing behaviour, it’s about building resilience and creating a culture of trust.
Tackling Each Team Toxin
Blaming or Criticism
Criticism attacks the person, not the action. “You missed the deadline” is feedback. “What’s wrong with you?” is criticism. The antidote is to focus on behaviour, soften your approach, and uncover the real request beneath the criticism. Use “I feel… I want…” statements to shift from blame to collaboration.
Defensiveness
Defensiveness is blame in disguise — “It’s not me, it’s you.” Instead, use active listening: reflect back what you’ve heard before responding. Or try the 2% rule: assume at least 2% of what’s being said is true, and respond to that. This lowers the temperature and invites dialogue.
Contempt
Contempt is the deadliest toxin. Sarcasm, sneers, and eye-rolls may feel small, but they corrode trust faster than anything else. The antidote is to pause, cool down, and speak honestly without contempt. Again, “I feel… I want…” statements build clarity without poison.
Stonewalling
Stonewalling feels like self-protection, but in reality, it suffocates communication. Silence only fuels the other toxins. The antidote is to check for overwhelm, create safety, and take small steps back into dialogue. Naming the fear behind the silence can open the door again.
Your Toxic Waste Disposal Plan
High-performing teams don’t avoid conflict — they prepare for it. They create shared agreements, practise antidotes, and learn to spot toxins before they spread. Without a plan, toxins pile up and pollute the culture. With a plan, you reclaim energy, restore trust, and fuel momentum.
So ask yourself: Which toxin is showing up in your team right now, and what antidote will you commit to today?
