The exact reasons aren't entirely clear, originally they hated NS because it allowed Europe to ignore Ukraine in the gas trade which left them more exposed. By the time of the full scale war I would bet the reason was more "fuck Russia" than anything more carefully reasoned.
(Not saying that's the case here, all considered)
When the pipeline was sabotaged, no gas and no money were flowing anyway, which makes it even more absurd. There is a very high likelihood that the front lines would be in the exact same place if Nord Stream had not been sabotaged.
Except of course, the EU would have had more leverage in negotiating LNG deals with the US and Qatar rather than making emergency deals.
EDIT: Downvoted while the Ukrainian transit pipelines were open from 2014-2025 and yielded Russian transit fees. And while Nord Stream was built partly because Ukraine stole Russian transit gas in 2006: https://en.wikipedia.org/wiki/Russia%E2%80%93Ukraine_gas_dis...
It's like you're bending over backwards to make arguments in the direction you already decided you want it to go. Like you're trying to force a square peg into a round hole. If you already decided what you want to think then why do you need arguments?