Quoting How to interpret Contest Ratings by EbTech:

Welcome to Division 1! As a pre-requisite to the esteemed title of Master, you are deemed eligible to prove yourself by competing alongside the best of the best, on the toughest problem sets that Codeforces offers. Professional whiteboard interviews cease to scare or even challenge you; now they're just an opportunity for you to flex over interesting problem discussions.

Getting to Candidate Master is no joke. My first ever Codeforces competition was Round 885, which is more than two years ago. Given my background in CP I got to Expert in only 9 competitions, but then I stayed for over a year in that layer because Codeforces competitions simply have different tasks from local competitions or olympiads. The first half of the tasks on almost every competition on Codeforces don't require any standard algorithms to solve. No segment trees, no Dijkstra, no treaps. The most complex algorithm you're gonna use is the sort function and the most complex data structure — map. But this comes at the cost of logical thinking and advanced problem-solving.