way too hard to end a game on twisted treeline

i just finished playing a 70 minute 3v3 game because the tower that guards the nexus is way to hard to siege. it's impossible to kill if the enemy team has any amount of wave clear and a tank which makes it completely not fun. my team had full build on everyone 250+ armor on everyone and the thing swatted us like flies. it's impossible to dive and even harder to kill if anyone on the enemy team is alive so my question is is this getting changed or will i have to never play this map again.