There are healthy, sustainable ecosystems, and there are unhealthy, unsustainable ecosystems.
While ants, wasps, and beavers can change a landscape to benefit them in an unsustainable, unhealthy way that will lead to their destruction, I think you have to indulge a bit of wishful thinking to not realize they are less likely and less capable of doing so than humans.
We'll need to set order in our own home before we look to the ants, the wasps, and the beavers.
We can engineer more sustainable food production systems at multiple levels. Would you consider terracing a whole mountain to maximize water use to be sustainable? The initial impact is quite destructive but the result is a more sustainable and persistent food producing ecosystem. We can also use the natural landscape but cultivate the species that grow in the ecosystem (food forest).
I believe we are meant to be the gardeners of the planet. Improving available food in an ecosystem invites more living things. It is a positive feedback loop. If we focused on building closed loop ecosystems that also provide food and materials we could be a benefit to all life. Focusing on not changing the "wild" is a negative view. We are the expert species at forming our environment. We should shape it so it provides for us and the rest of the critters.
In fact, it muddies the question itself by distracting away from measurable criteria towards vague and general, broad sweeping conceptual ideas of “Unhealthy” “Unsustainable”
The absence of a defined criteria does not imply an ideal criteria does not exist. The ideal is somewhere between the two extremes, ants, wasps, etc. taking over the entire planet and ants vs ants/wasps becoming extinct. Through reason, analysis, etc. we can get closer to defining a more measurable criteria.
While ants, wasps, and beavers can change a landscape to benefit them in an unsustainable, unhealthy way that will lead to their destruction, I think you have to indulge a bit of wishful thinking to not realize they are less likely and less capable of doing so than humans.
We'll need to set order in our own home before we look to the ants, the wasps, and the beavers.