Final Update: Notified my work weeks ago I'm leaving for a family vacation in July, tickets were bought, non-transferrable, and they are panicking, begging me to cancel

Final update, hopefully I linked the post correctly. Thanks to all who commented or interacted with me on the previous posts, all comments were read, considered, and offered many perspectives I didn't consider, so thank you. In short, I notified my employer months in advance that I was leaving for vacation. They needed coverage for 5 days, and they told me that if I went, I would not have a job when I returned. Cool. After some reflection and your encouraging comments, I decided to look for another job in the industry I work in. It's pretty niche so the major players know of or have met each other. I reached out to a vendor of the company I currently work for and they immediately offered me a position, fully remote and at the same pay scale. They said I can start now, later, whenever; they are stoked to have me on the team. They mentioned I have a great reputation, and all of our vendor interactions have been positive, and because they were a vendor they couldn't approach me, but they were happy I reached out to them. I'm over the moon! I gave my current position a month's notice, am training my replacement over the next two weeks, taking a short break, and then starting my new remote position. And, I get to keep my vacation with no hassle :) All in all, I'm really happy how this all worked out and not sure if I would have persued anything new without my current position treating me so poorly, so honestly, kind of have to thank them for opening my eyes.