I’m going to answer your question, and it may seem very direct, but it’s only because I speak towards an increase in mercy for every soul.
For whatever reason, there are a lot of angry people in the world; perhaps some justified, and perhaps others are not.
In any case, including your question, I always rely on the same advice Jesus gave to the apostles when they asked him to teach them to pray as John taught his disciples: The Our Father.
There’s a few ways to look at the Our Father. Thomas Aquinas broke it into seven petition. But the other day I saw a very good talk on the Our Father, where the Priest advised looking at the Our Father as three “phases” we should go through in every prayer. Basically, seeking first the Kingdom; then asking for help with our daily needs; and, finally, we look to avoid sinfulness. In either case, embedded in the Our Father is a sentiment very similar to the Golden Rule: “Forgive us our trespasses, as we forgive those who trespass against us”.
Scriptural elaborations on how to interpret that passage abound, especially in the New Testament; and, yet, it’s often one of the hardest passages to interpret and accept. But the passage “If you can’t forgive others, then why should God forgive you?” applies as directly relevant. It’s really that simple.
The best thing to do, I think, is to ask yourself if you would be willing to suffer the same wrath as you are essentially wishing on the other person, and then to forgive them anyway - even if they were as good as condemned to eternity by Jesus Himself, which He would never do. Christ’s naturally loving nature is Love itself, so He offers no resistance; thus, it is each individual soul’s agency and responsibility to respond to that love in like kind to all of God’s creation. If anyone condemned the devil, then it was the devil himself.
To help keep perspective - it’s helpful to ask yourself - why are you a Catholic? Do you really love God? In my most angry, tempted, sinful and downright vulgar moments - I don’t think anything in this earthly life is really comparable to the Glories of Heaven.
What your soul really seeks is mercy and forgiveness. That by no means makes you a bad person. Quite the opposite. It’s just you’re confronted with a problem of faith. Simply look to Jesus for the answer. He has put nothing in your hands you cant deal with. And turning to your opponent’s Creator is a great and merciful way to take a leap of faith right back into the loving arms of your own same Creator.
It’s also Lent. And this is a great chance to dismiss the temptations of the devil. Tell him to leave you alone. Ask God for help. And He will send His angels to come and minister to you - and everyone else involved in the situation you are contemplating. It may be hard to accept at times, but it’s best for everyone, and it’s in keeping with your faith.
You may have to make a bunch of hard decisions you may not necessarily like; but, I’d say, try to steer clear of the person, and wish them the best you can to resolve the situation. Again, stay focused on the mercy of Christ - seek first the Kingdom - as it is eternal, whereas all else will pass.
Pax.
