I wasn't even G5, I haven't played rank game for almost a year. But after September, I started solo rank, sometimes a duo rank. I was planning to just get gold5 . If u can check it out from the lolking, I stopped playing rank games for almost a week after I got to gold rank. The reason why I started rank game is because one of my friend decided to get diamond. He and I are basically same lv players. So I thought if he could get diamond rank then I could at least get plat for sure. So I went to play rank again and get to plat in less than 2 weeks, and I usually played at the weekend at that time. Then after I made to plat, opgg.com told me my mmr was super high, I might skip rank lv. So I decided to play more games. Although I didn't jump rank lv, but eventually I made to plat 1 with 100 points at the very end of this season. I tried to reach diamond but I lost the second and third promo games after 1 win and I didn't have enough time to play 2 more games so I didn't make it to diamond before season 5 ended. But after that I played couple games and got 100 points again and made it to diamond 1 day or 2 days after I couldn't remember clearly.(for this, I have to complain, I only lost 2 games then the rank was closed and automatically counted my prom as failed. I don't know if this is because the season end or something, but usually I have to lose one more game to state failure of promotion)