You have to claim the draw. If you want it automatic: Preferences > Game behavior > Claim draw on threefold repetition automatically

is your puzzle difficulty set to easier or easiest? if so you're playing puzzles rated below your rating, such that you win less (but more often) and lose more points (but less often). if you want to …

Go at top right > click on your username > Background > Light https://i.imgur.com/ySjYmpe.gif

https://i.imgur.com/7dYe4Xq.gif

Is it possible to browse/search/filter the masters database? I know you can access a few games using the openings explorer, but what about browsing/searching it? (E.g. by year, by player, etc.)

There's a button in the hamburger menu

There is no relationship between average centipawn loss during a game and player rating: https://web.chessdigits.com/articles/predicting-rating-from-centipawn-loss

that seemed like a pretty straightforward and understandable puzzle

@vqh then you could probably post in the chess discussion forum instead of the feedback forum

"Lifetime" sems to imply forever