Demoting from plat 4 after only being in it for >10 games.

Ive already made a support ticket and gotten some responses that were both bad and good. One of them advised me to go to the boards and give feedback here!

The general gist is that after 20 or so games in bottom role i got plat. I was pretty happy and then played a few more on it. Losing some winning one or so. Then i played some offrole games in whatever role i felt like playing to get my placements done. I played a few and then played a bit more bot lane and then did some jg and i noticed that i was no longer plat.

Well that is insanely frustrating considering I still only had around 30 games in it. Did losing in an off role cause me to drop from plat? Or did losing on bot lane cause me to and did Inot notice? Either way it seems insanely stupid just for the fact that my win rate was around 50 % and my mmr was still plat 4/3. Either way it seems insanely stupid just for the fact i wasn't there long and in the past years of losing at plat 5 0 LP i didn't drop after a lot of games.

I guess don't lose at all is the way to avoid this issue.