I'm going to cut someone out of my life because they didn't let me use their laptop for a quiz
Did you ask them to use the laptop?
Yes, I asked them and they refused to lend me their laptop.
It is wrong to abandon a friend over something trivial. Did you consider they might need to use it at the same time? It does belong to them not you.
I trusted them and they betrayed me.
It is wrong to be upset at them over this. If you need a laptop you can buy your own or rent one to use for school work.