The apex is the planet receiving the two squares from the opposing planets. It’s not a huge misfortune having a t-square. It’s just an area where stress and the pressures of life build and release. The pressures come from the two opposing planets and their houses then the energy releases through the Apex planet and it’s house.
When these things were handled inappropriately he landed himself in prison. Neptune in his third is his Apex planet. He handled the problems in an Unhealthy fashion by using drugs, stealing and lying. Talking about his addiction and other personal issues honestly has helped him feed the potential with in himself. He has grown into an adult and is a family man with a beautiful wife and kids. He chose to turn his T-square in to something positive.
If Mercury is in the 9th and the Apex planet you could release stress positively from the area of life where stress builds (12th and 3rd houses) by taking a vacation, or through spirituality for example (9th house). Maybe you can use Astrology (also ruled by the 9th) to destress or release tension when issues surrounding Pluto and Jupiter reach a boiling point. Every one has pressures and stress. It is what makes us interesting and gives us character. Hope this helps.