[Question] How to deal with the sense of demotivation that comes from thinking about determinism?

What I know about science and philosophy suggests that determinism is probably true—i.e., everything that will happen throughout the lifetime of the universe was predetermined at the beginning of the universe.

When I think about this I get a sense of demotivation and pointlessness. If I know (or assume) that everything I will do is predetermined, that undermines and weakens my motivation to do anything. Why bother with effort and hardship if, at the end of the day, I will always do the one and only thing I was predetermined to do anyway?

When I need to motivate myself to do anything that takes effort, I need to either not think about determinism at all or tell myself that determinism might be false.

Does anyone else feel this sense of demotivation? If so, how do you deal with it?

When I have asked this question elsewhere in the past I have mostly gotten answers that were unhelpful or even downright mocking. This leads me to suspect that the sense of demotivation I get is not a human universal but something that comes naturally to some people and is completely alien to others. Therefore, if the problem seems easy to you, I would ask you to please think really hard about whether you are actually helping before you post.

And please, for the figurative love of God, no joke replies.

Note that I did not use the term “free will” in the above. One can assume a compatibilist stance and argue that our choices are still “free” even though they are determined. As far as I can tell, that is a word game which does not solve the problem. At least, I have met no explanation of determinism that assuaged my feeling of demotivation.

I previously asked a variant of this question in r/​AskPhilosophy on Reddit: https://​​www.reddit.com/​​r/​​askphilosophy/​​comments/​​rvvyc4/​​what_to_do_about_the_fatalist_argument_that_if/​​

Thanks in advance!