It mentions monopolies as a problem, but then offers no solutions to it

The site has specific solutions...

It’s time to rein in the monopoly sectors that aren’t competing to bring prices down - like our supermarkets, banks, building materials and power companies. It’s not right that these businesses make record profits while ordinary Kiwis cut household budgets and our economy stalls. To save the average Kiwi household more than $40 a week (projected) and boost competition and growth in the wider economy, Opportunity will:

• Bring power prices down by reforming the electricity sector.
• Bring other prices down by breaking up or regulating the cozy mock-competition among the big banks, building material suppliers and supermarkets.
• Strengthen the Commerce Act and boost funding to the Commerce Commission.

Detailed policy is coming, they are looking at this issue. Both major parties have taken a pass on this; what more are you looking for?

It positions nature as subservient to commerce

The FAQ specifically calls out old exploitative business models; the leader comes from a background in sustainable business leadership.

One reason I like Opportunity is because they focus on a sustainable economic model, working within the natural boundaries and moving NZ forward into a stable future where we don't have to destroy the awesome natural environment, I and most kiwis enjoy and want to see protected.

From the site:

We depend on nature, but we’re stuck in old economic models that ignore the health of the land and ocean we call home. In the next economy, nature and business aren’t separate, but one and the same. We believe that people can wear suits AND fight hard for the natural world at the same time. To build the next economy where purpose-led, low-emissions businesses grow wealth by restoring nature, Opportunity will:

• Invest in new, nature-positive sectors like continuous cover native forestry and a nature market, where actions to improve biodiversity are rewarded.
• Support landowners to transition to high-value, low impact land uses through spatial planning and innovative technology.
• Listen to business and community leaders pathfinding nature-positive business frameworks, like Rewiring Aotearoa.
• Design a circular plastics economy aligned to the objectives of the New Plastics Economy Roadmap developed by the New Zealand plastics industry.