Hey guys, so i was looking into the final judgement and it said i could get it if i was in the institute or railroad, but i couldn't if i was in the brotherhood of steel, but no one has said anything about the minutemen. Would I still be able to get it if I was in the Minutemen?

Minutemen aren't one of the main factions per se. It's only the BOS, Institute, or Railroad. To get the final judgement, you would have to side with either the institute or railroad.

*edit* Decided to take a look at the wiki, and found: "If you are currently siding with the Minutemen and you want to obtain this weapon without siding with the Brotherhood of Steel, just continue the Railroad quests until you receive the quest http://fallout.wikia.com/wiki/Precipice_of_War, but do not go to Police Station. Instead go to The Prydwen, and kill Elder Maxson in order to receive Final Judgment.". So yeah, you're basically siding with Railroad.

You can kill Maxson, take his weapon and battle coat and go on with the Minutemen route.

I try to do quests for the railroad but my game glitched it out...

The minutemen are my labor of love. I built them, I provide for them, I command them. So they are my natural choice. I couldn't go with the BOS, since roleplaying or not, what they stand for crosses every line of my inner being and I couldn't identify with any character crossing these lines.

So railroad or institute it will be. I can't imagine anything else for the above reasons.