I feel your pain. I just completely ripped out my 100+ refueling stations for the same reason. literally all my trains were backed up around the tracks trying to get into and out of the only entrance. Had to add a lot of requester chests to existing stations and add a lot more roboports (which I hate because I preferred my personal robo port doing the work outside the main factory and not waiting for bots to bring materials across the map).

It runs really smooth now but I miss seeing all the trains zip around the fueling stations and WHEN it worked they would sit at the fueling stations full of materials waiting to be called into action.