I guess you wouldn't be among the 700 scientist behind Scientists for Future then.
Or the 15 000 scientists that are now supporting a letter to the government of the world.
Simply stating a possible future based on knowledge and facts is not scare mongering. Right now it even seems that certain events are happening sooner than anticipated. Like the melting of the polar caps and the permafrost in Siberia. With very dangerous consequences. Or that we're facing the 6th mass extinction event. Why is this exactly wrong or just hype in your opinion?
So I am really not sure on what basis you actually place your doubts. I am not a climate scientist. But climate scientists say we're in really dangerous and unknown territory here. That we're doing nothing to stop our current behaviour. And that we will face very serious consequences.
Except that it now happens on a global scale and not just in some regions. So it's not just getting a bit warmer in summer and a bit more cold in winter. We will see disruptive events that destroy whole eco systems. Eco systems like our forests, reefs and oceans work in cycles where they regenerate and constantly change over time keeping a balance. However if those cycles are broken they can not be recreated again. Once the Ocean has reached a certain level of acidification pretty much most of the creatures living in it will be dead. We could very well look at a global collapse of the eco system here.
You could say we're right now doing a sort of terraforming. Just that we create conditions that are not very supportive for human life. If like a large part of the global food production is collapsing you won't see people grow grapes in Britain anymore.