I don't get jealous of people having nice things, but I have been jealous of how easy some people in my life seem to have it.
The last few years had been tough. Was let go from a banking job after our 2nd was only 5 months old, struggled to get on our feet, luckily had credit cards to stay in our house. Unemployed 2 months, started working at a place, was left a "time bomb" for lack of any other way to call it from the person who's role I took over as she left hurriedly, was unemployed 4 months this time, took up a part time job at a gas station, worked a HVAC office job and kept the part time so my typical work day was 7AM-5, 6-12AM for about 2 years. Found a job at an office that I can walk to from home, dug out enough to quit the 2nd job, paid off most debts and currently can actually enjoy my 2 daughters, and help my wife with our newborn at nights when I'm home.
During that, my brother in law got 10k in inheritance , threw 2 into bitcoin and pulled out with 70k. We received similar, but it went to bills because that was where we were at. Him and his wife were also the type that found a home they wanted to live in and had the sellers reduce the price for them because they liked them, that kind of stuff. I have no animosity towards the brother and his wife but my wife and I just would kind of throw our hands up at how things happened to be handed to him.
I was in a shitty place, and depressed. I'm glad I was able to crawl out of it and be present and around for my family and actually you know enjoy life. I don't get jealous of that stuff anymore, I just tell myself if I work hard, I can reward myself and eventually get whatever it was that I wanted.