?so I completed the battle for bunker hill and wanted to side with the minutemen, but saw nowhere to pick up the next quest so I ended up siding with the railroad.

I wasn't too worried about who I sided with as long as it wasn't the institute?.

the problem I have now is that ive shunned the institute and cant get back to use a terminal for the RR quest line

is this a bug or am I missing something? I intend to play through the game more than once but I'm lvl 53 right now and if I have to start over again just so I can see the end, idk if I will continue playing

any tips or advice is greatly appreciated

You might need to revert to an earlier save, proceed Institute quest till you get the

then go "shun" (aka start slaughtering everything in your path) them.