Maybe you could give us more details on how voting works in Canada. I was under the impression that your ballots were in booklets and that they were counted by people, not machines. Is there a uniform system throughout Canada or is each province different?
As for your questions:
I've heard about levers or something that you pull. Is that true?
Some counties still use mechanical voting booths. You go in, pull a big lever and a curtain closes behind you. Then you operate tiny levers next to your choices to vote. When done, you turn the big lever again to open the curtain which also records your votes on mechanical counters and in some cases also on a paper tape. Very few counties use these systems anymore.
And why does "Black box" suck so much?
"Black box" just means there is some voting device that as far as the voter is concerned is unable to be opened and inspected and you simply have to trust that your votes are being recorded as cast. It's not like a paper ballot where you can actually see your marks on the ballot and that ballot is what actually gets counted either manually or by machine. In some respects the old lever machines were black boxes in that you could not see the mechanism inside and confirm that the right counters were being incremented. Still to rig an election with lever machines requires a lot of effort to open each machine and then go back afterwards and undo the rigging.
Electronic black boxes suck because they enable wholesale rigging without the need to access each machine, and if there is no paper trail such rigging becomes impossible to detect and correct.