People who desperately want something are people who will face some problems sooner or later. Not big or small problems but problems that will negatively affect them and maybe even their mindset. If a person desperately wants to get into a relationship just for the sole purpose of satisfying their lust they will always be searching for girls/guys to get into a relationship with. Desperately wanting something can lead to you being easily manipulated by someone who knows what you want or need.

Being desperate can be a big problem towards yourself and sometimes even the people around you. Trying to get people around you to help you get something you desperately want can ultimately cause them to think that you’re only talking to them because you need their help. Sometimes you can leave yourself very open and vulnerable to people who try to manipulate you because they see how desperate you are for a certain thing.
Desperation can be beneficial towards achieving goals, however being very desperate can lead to poor decisions which are not essential to achieving your goals. Poor decisions are what lead to people’s downfalls and what prevent them from reaching their goals. People who are desperate will make bad decisions and they will soon regret it.

Missing opportunities, this is something that can possibly happen if you’re desperate for a certain thing. If you’re desperate for something you might take some opportunities for granted and miss out on them. This may lead to a lot of regret and despair later on depending on how big or impactful that opportunity might have helped you. Once you’ve felt despair there’s a good chance you can start feeling depressed which isn’t good for your mental health.
In conclusion, people who are very desperate to gain something may have a harder future due to being vulnerable to manipulation, missing out on opportunities, and making hasty or bad decisions. Going through all of these will ultimately lead to depression. Slight desperation however can be used as an extra motivation booster to work harder towards your goals just don’t be overly desperate.