We often give credit to the devil when it is really plain old free will that allows people to lie and hurt one another.
Stop putting so much power into what other people say or do. Be a person of truth and love and virtue.
A trial is like a workout or a training session or piano practice. We try, we may fail, but we get back up and try again, slowly building our strength and endurance.
Give this chapter a read and repeat “resist and he will flee”
St Paul told us exactly what to do:
Battle against Evil.
Finally, draw your strength from the Lord and from his mighty power.
Put on the armor of God so that you may be able to stand firm against the tactics of the devil. For our struggle is not with flesh and blood but with the principalities, with the powers, with the world rulers of this present darkness, with the evil spirits in the heavens. Therefore, put on the armor of God, that you may be able to resist on the evil day and, having done everything, to hold your ground.
So stand fast with your loins girded in truth, clothed with righteousness as a breastplate, and your feet shod in readiness for the gospel of peace. In all circumstances, hold faith as a shield, to quench all [the] flaming arrows of the evil one. And take the helmet of salvation and the sword of the Spirit, which is the word of God.
And about peace, we are promised peace in the midst of storms. Anyone can have peace when there are no storms, that is why our peace passes all understanding.
Fr Jaques Phillipe wrote a very small book titled “Searching For And Maintaining Peace”. I highly recommend it.
Walk away from things that steal your peace, be that conversations or social media or hobbies or habits.