I don't know anyone who would go on a suicide mission to blow up a pipeline.
I think despair is part of the process towards a kind of acceptance. Acceptance of the reality and the actual likelihood of any real possible change, that's given the issues you very eloquently highlighted.
Divestment programs could hurt the pockets but only if some big wallets get behind that and I don't see much apetite there for doing anything different. Just more of what we had before but greenwashed.
Renewables are great but also made from fossil fuel materials, not opensource which keeps technology for good from progressing. There are a lot of areas one can go into. The planet itself will continue without us, life as we know it will not.
Money, in the amounts that really matter is not going into move to a more equitable, more ethical and climate change reversal it's going into the space race, the weapons, the consumer products... things to keep us distracted. Is that realistically going to change? Nope, we will see an article about a whole continent going extinct and switch the channel to watch the Kardashians because reality is horrifying.
This false hope is not doing anything to prepare us or indeed to adapt to the difficulties some of us are already living in.