This is a rather controversial topic in the sense that everyone has their own opinion on it, which is fine. A lot of people believe that there is no point in going back to an ex and that once a relationship has ended, then it should not be rekindled. You will also find people that think patching up and going back to an ex is perfectly acceptable, and if you are looking for an honest answer, then both cases are true. So, should you see your ex again? Well, the answer is not that simple, and if anything you need to ask yourself a bunch of questions first.
We tend to romanticize past relationships and older partners, especially when we are unhappy at the present moment. So, the first thing you need to ask yourself is exactly how the relationship between the two of you was, this requires objectively analyzing all of the facts of the relationship. This means you have to look at the good, the bad, the red flags, what caused arguments, and most importantly, what led to the breakup.
If the breakup or majority of the arguments were because of a lack of shared values and beliefs, then you have to assess whether this will be a problem again if got into a relationship again, if the answer is yes, then getting back together would lead to repeating the same cycle. If you think that both of you have changed and are in better places in life then you can talk to each other and see how it goes. If there were some very obvious red flags in your relationship like controlling behavior, jealousy, stonewalling, constant criticism, etc. then you should sit down with a professional and discuss the issue better with them.