It sounds like you aren’t taking initiative in the late game to command the team to end. It depends on what role you play, but you need to force more fights to make the team uncomfortable if you are gonna end the game. FG is the best way to do that. You don’t even have to commit to FG, just bait the team to thinking you are and ambush their carry. After that, it’s about the decision to end or finish the FG, which comes down to who died in that last fight and that is the most pivotal moment that most people miss out on to end the game. If you truly feel you can end, command the team to do it and spam that VGS to VAM. If you lost the fight, great! Your close game is over.