perpetual check: winning on time?

This wasn't much of a game but it ended on a series of perpetual check moves and I am wondering if all the back and forth is just stupid or is a valid choice, forcing the checked player to break out of the check cycle.

I don't like this sort of scenario but I seem to run into it a lot.

You know that White could have declared a draw immediately after 30...Nf4+, right? And he had at least a dozen later opportunities, too. He just didn't know the rule, I guess, right?

you know you had much opportunities to make huge differences in the game, but i guess you didnt see it.

i thught draw by repition was automatic draw

Nothing (apart from the original statement of rules) on Chess.com suggests that you might want to claim a draw, and rightly so. You have to notice it, decide to claim it, and then click on the ordinary "offer draw" button. If you're in a position where you can claim the draw unilaterally under the rules, it then registers the draw immediately.