This isn’t Overwatch or Halo… this is a MOBA style game. You cannot jump into a versus match run off and do your own thing. Stick with teammates, ping for help or to warn teammates of an incoming attack/gank and never trade a kill by chasing an enemy into their base. If you chase after an enemy and get greedy you could easily walk into a trap. If you have to die to get the kill, it will not help your team.
If you’re low on health and there’s no support turrets ping a healer or teleport back to base. It’s better than dying and sitting out of battle. You’ll lose XP and your team will get out numbered.
If you’re new and you don’t have good gear to buy, use it to build turrets/lane support. Doing so gives you experience and helps even out fights.
Ignore your kill ratio, there tons of other ways you can help a team.
I don’t mind getting new players, just play like a team and everything will be fine…