To add to this: The great majority of nuclear plant operators are companies with a majority stake in fossil fuels. Apparently fossil fuel is more profitable for them than nuclear. Additionally, it is much, much more cheaper (like a 1:3 cost ratio) to produce renewable energy via solar and wind than to do it via nuclear energy. Also, fissile material is non-renewable and mining sites are mostly situated in non-western regions, making us yet again dependent on energy imports. Further, nuclear energy is just not as quickly scalable as renewables, as the construction of nuclear plants usually takes around 10 years, at minimum, whilst wind and solar parks with the same output as nuclear reactors only require a couple if years. Every pro-nuclear advocate therefore effectively supports the centralized fossil fuel industry (as opposed to decentralized energy production of renewables) and fosters dependence on increasingly expensive fissle fuel imports. The cognitive dissonance by proponents towards nuclear energy simply is as deep as the money pockets of our fossil fuel overlords who are desperate to keep control of the narrative and ownership of the energy production.

I dont think there is an easy solution for the lacking performance, but to force yt to use a set qulity you can use the FF addon Enhancer for YouTube (https://addons.mozilla.org/en-US/firefox/addon/enhancer-for-youtube/)