Sometimes it's hard not to want for more in our lives, especially in challenging moments. What we often don't think though, is what is this (whatever is happening) teaching us right now? What is it doing for us, not to us? It could be an event, a person, a decision, gum on your shoe, or whatever. It may feel unfair, like circumstance has gotten you to this point or things just flat out beyond your control, and you start to tell yourself, "Gosh.. if only... [insert bogus excuse that seems valid at the time]."
Stop it! First of all, a garden of weeds is not something you want to be growing (jealousy, comparison, regret, frustration, disappointment, etc). Instead, focus on weeding out those negative emotions and replanting them with things you would actually want and be proud of. For example, when you feel a twang of jealousy toward another, try replacing that with admiration and respect. If possible, show that person that you admire them, that's a beautiful thing! You never know what that small act of appreciation could do for them OR you in that moment. Or if it's nicer things you want, turn that thought into being grateful for what you have now, and you may very well realize it's more than enough.
If you feel regret, which can be a deeper rooted weed, try approaching one or more of the people involved in whatever situation caused those feelings, and do what you need to to make peace with it. Not easy, I get it; but, very liberating!
If you feel sadness or disappointment, for example maybe you failed at something important to you (an exam, a relationship, a set at the gym, an assignment at work), replace that negative emotion with determination, grit, and getting back on your feet! Failure is a completely normal process in life, and the way you respond to it is what will make you a stronger individual.
Another thought for you? Don't piss on anyone else's garden. Yeah, you read that right. Just because yours isn't green (yet) doesn't mean you need go around turning anyone else's yellow. Focus on making yourself the best version you can be and then bottle up that Miracle Grow and go sprinkle it around on others grass!
Have an awesome day.