Nope, never said it was the highest it ever was under Harper. He did manage to get it up to the highest it was since the 70's @38.3% while JT has only got it up the 33.8% at last count. And once again, we have to consider the current government is having to deal with a pandemic which will cost money.
Wrong, it was well over 60% during the nineties and will likely be around 55% by the end of this year. Debt to GDP is a ratio, GDP is now sinking, Debt to GDP would be going up even if the budget was balanced.