Is nasus just bad this season?

I haven't played nasus in a while but I almost have lvl 5 mastery on him so I planned to get that last bit of mastery needed, but it feels like nasus is just incredibly weak, can't do anything in lane and doesn't seem viable late game either. Is there something wrong with my build or my strategy? Which is to farm till 500 stacks then engage in teamfights. (Btw this is not a top ranked loadout or a old top ranked)

I haven't played nasus in a while but I almost have lvl 5 mastery on him so I planned to get that last bit of mastery needed, but it feels like nasus is just incredibly weak, can't do anything in lane and doesn't seem viable late game either. Is there something wrong with my build or my strategy? Which is to farm till 500 stacks then engage in teamfights. (Btw this is not a top ranked loadout or a old top ranked)