well i recently did the brotherhood ending of fallout 4 and i was expecting a lot more.
throughout the game I didn't feel like I was in a major armed conflict, the biggest battle I saw was 3 generation 2 synthetics against some brotherhood beginners (I could swear the super mutants killed more brotherhood soldiers than the institute), no There was no mission to attack a case of the title (except when we have to enter the max fusion)
There was no big battle, and the attack on the institute was disappointing, I expected something much bigger, more like Hovver Dam.
The road to the institute is strangely calm, you receive a total of 6 attacks, only 3 of which are from the institute. I expected them to desperately fight against Liberty Prime, but they simply ignore you, but when you arrive at the ruins of the CIT, there will be a big battle. and? No, the institute didn't even create a defensive line, they didn't put up any anti-aircraft, they didn't fortify the place to withstand the brotherhood's attack, the battle inside the institute is a bit mid-range but I won't talk about it.