My opinion is largely colored by the IPCC Ocean/Cryosphere report. I closely followed each IPCC report and this was by far the most "doomer" of the special reports released by the IPCC. Some highlights:

  - ocean acidification and deoxygination (imo the most alarming and underdiscussed doomsday scenarios of climate change): About 0.5 to 3.3% of dissolved oxygen had been lost between 1970 and 2010 which has led to the rapid expansion of Oxygen Minimum Zones ("dead zones"). Acidity has increased by 30 to 40% and at a clearly accelerating rate. That's 10 times faster acidification than at any other point in the last 300 million years
  - they estimated oceans had absorbed about 90% of "excess global heat" and their ability to absorb is slowing rapidly
  - up to 99% of permafrost could melt by 2100. Permafrost melting was completely unanalyzed in the 1.5C report due to lack of good data

Forests on the other hand have shown surprising resilience. And, if they survive the impending destabilization, they might in the long term (I mean looong term) even benefit from increased CO2 concentrations as they historically have.

PS the IPCC reports are more accessible than people realize. Even the technical reports are often not much more difficult to parse than the policymaker reports meant for the general public. I'd quite recommend giving them a try