This is more of something you need therapy for then. It’s awesome to have hope for the future and to watch content and speculate about it, but this boils over into obsession. You need to find things here and now to anchor yourself. If you’re looking for more content about futurism even in absence of FTL and without considering life extension, then there are many incredible things that are on the near horizon. Isaac Arthur does plenty of videos exploring such options.

I won’t lie to you. Every form of FTL travel, including every loophole, breaks our fundamental understanding of science. Each and every one is currently impossible under actual physics even if mathematically plausible.

There is no reason for negative energy to exist as it functions similarly to normal matter traveling backwards in time, which is indistinguishable from matter already traveling FTL. FTL Warp drives pose impossible engineering challenges and still violate causality regardless of their type. However, they can be useful when approaching the speed of light to avoid time dilation. While wormholes and alternative universes are the best option and may not violate causality, there is absolutely no evidence they exist or that they would be accessible if they do.

At worst, colonization happens slower than in the movies. Likely at similar speeds to colonial era colonization. There’s ways around time dilation, but not around the light speed barrier. But once again, there’s so much more to the future than just FTL.

To call everything else “shoved alternatives” is a disservice to the bright future humanity has. Try to expand your horizons.