Nasus q on inhibitors and nexus is redicilous

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2014324316/216724677?tab=overview

this is the match history, i was akali, after 104k dmg to champions i lost cause i had to sit back and expect a full tank nasus who came after my inhibs and 3-shot them, i leave base once and he walks in takes my inhib with 3 q and then moves on to the nexus which he takes down with 3 hits as well.

For a champion whose dmg only goes up as the game goes on, and who can destroy turrets late game with 4 hits, he shouldn't be able to q inhibitors and the nexus as well. After a certain point in the game u simply cant leave base for 15 seconds cause that's all it takes to end the game if he back doors, he can have tp, so even if he is across map, you can't rest for a sec. U have to give up on late dragons and barons just to avoid him smashing ur inhibitors and nexus in 15 seconds. How is that even balanced??? Any game after 50 min is 100% win for the team that has the nasus, unless he is totaly r%%%%%ed. How can this be fair? Why should i have a timer every time i play against him and know that if i don't end the game by then, he will win.....?

I am not asking for much all i am asking is for his q to stop being applied on inhibitors and nexus, rengar's q doesn't idk why nasu's does. Even as full tank build, all he needs to do is grab some q stacks and deal more dmg to structures than any champion, how is this not op and unbalanced???