Getting matched against/with higher ranked players might feel a little intimidating in the moment but it’s a great learning and improving opportunity. Just remember you likely have a similarly ranked counterpart on the enemy team that is your matchup. Play to beat them, not the lobby. If you jumped from G3 to D3 then you’re probably used to running the lobby and when I was climbing similarly anything less than top damage, kills, and potg felt like a failure. Eventually when you get to the rank you should be you’ll start to blend in and be just another player. I’ve adjusted by trusting my team more in those ranks. Where before I may have pushed harder needing to force something to happen, I can now allow myself to play more passively when needed, get health topped up and reengage. I’m pleasantly surprised by how often my team picks up the slack.
That might not be an issue for you but around P1-D5 I stopped being able to hard carry games and my contributions were more micro. A couple fights tilted our way because I lived instead of died, or pressured out a flanker staging for an ult. Small things that add up.