I'm in the same place, my career high is credible threat gold and I was too busy to play all summer so I decayed to worthy for silver and I have been stuck ever since due to absolutely useless teammates. I have a very positive KDR and have above 75% kill participation playing mostly lanecarry. My teammates constantly build terrible builds, take 1v3's, place zero vision, and get close to no kill participation. The only way I can manage to rank up is to triple stack with my team Pork and Beans....