If it warms 2-3C as the IPCC predicts, humanity will still be thriving in the 2100s. Capitalism will still be kicking along just fine, and we ll probably be richer than ever.
It's not just about the warming. Can you name one source of water in your neighborhood that's not polluted and can be drunk? Are you aware of the massive desertification due to industrialized agriculture? There's more than isolated signs of civilisational collapse. The system will change that's for sure. The question is whether we'll choose a mildly-painful transition, or endure a deadly ecocidal hard reset.
Ecological problems are not coming for us in the 2100s. They're here now and keep getting worse.