Battle Pass is not too hard
I frequently see complaints that because of things like Arenas challenges, etc., the battle pass progression in unfair. Well, I started playing on a smurf account about a week ago to queue in my best friend's pred level lobbies without wrecking the stats I've worked very hard to get in my typical medium-difficulty lobbies that I get soio queuing or playing with my other (also mediocre) friends.
I haven't even looked once at the challenges, neither daily nor weekly. And the account's battle pass level right now is 34. Zero Arenas games played. That's a third of the way to finishing, in one week without any effort. I am not getting loads of kills or damage in these games, if i did so I'd have lots more levels. I suggest after this experience that given regular play time, the battle pass is not difficult to finish, it's a breeze.
In fact, after looking at this, I may play the first month or so of next season on my main without even looking at challenges. Once they start stacking up in the latter half of the season, they practically complete themselves.