I don't think we're "fucked" at all by climate change, most of us will be long dead by the time the worst problems hit. 2100 is so far in the future it's not worth worrying about, just as nobody in 1940 cared about what would be going on today - now, as then, there are far more immediate problems to tackle.
Solving the cost of living crisis, the housing crisis, the wage stagnation crisis, the energy crisis, all of these are more urgent problems, as are modern slavery, mass migration, rape conviction levels, the Russian war and countless other things.
A 1.5C rise by 2050, a 4.5C rise by 2100 or whatever figure gets thrown around is irrelevant to me. If I'm still alive in the 2050s I'll be a pensioner, probably a poor one, so if anything an increase in global temperature will be a positive thing for me because I won't have to have the heating on so much.
It's hard to take the "won't somebody PLEASE think of the children!" brigade seriously. Humans have never cared what impact their present behaviour might have on future generations, because they're already struggling to get by themselves. My taxes partly go towards servicing our national debt, some of which was accrued before I was born and certainly before I could vote. People have to pay for the actions of those who came before them, that's always the way.
If you are genuinely worried about future generations, just don't have children.