KDR can be fun to look at and see the differences between seasons, but SBMM, solo-queueing versus playing in a squad, and how much you play ranked can have such a huge effect on it. It really makes it completely pointless.
My matches are filled with masters and pred players and my 2 friends that regularly play tell me they never see them in theirs. I do so much better when I play with those friends because of the matchmaking and the added bonus of being in a squad with people I can talk to and coordinate with.
The first 400ish games of this season, I was just playing with them and had a 2.0 KDR and 12% win rate. For the past 3-4 weeks I've mostly just solo queued because of our schedules no longer lining up and both stats have plummeted lol. I'm at 8% and 1.37 now.