I guess I can still be considered a new player, have only been playing 3 or 4 months. I have seen this type of stuff time and time again sometimes i'm the target and sometimes it is a team mate. I just drives me insane with the constant trolling and harassing by your own team. I don't know if these players that do this think they are helping or maybe it makes them feel better about the mistakes they made or whatever the issue is but it isn't helping your team at all, you are not teaching anyone anything.
As a matter of fact what you are doing is making the new player salty, and when someone does try to help them they look at that person as being toxic also. WE ALL SUCKED WHEN WE FIRST STARTED PLAYING EVEN YOU!!!! Keep that in mind. Also keep in mind while you're trash talking someone saying how bad they are remember they are ranked the same as you or close. Not counting those first 10 games to establish your rank. Also remember you have had a bad game or a bad matchup at some point in your time with LoL.
I just wish some of you toxic players would just relax and play the game and quit trolling someone new or someone having a bad game, it will make the match so much more enjoyable if you would just keep your toxic opinions to yourself. If you truly want to help do it in a respectful manner, try to help them how you would want to be helped. I'm sure you wouldn't listen to someone who told you "you suck" or "your just bad" or "you should uninstall the game". these are some of the more popular ones I have seen.
For me personally if I'm playing bad no one is as hard on me as myself and someone telling me how bad I'm playing when I already know this isn't helping at all. Maybe pull your head out of your ass and come help someone struggling in their lane would help a lot more then telling someone how bad they are. someone telling you to play more careful when your dying under your turret trying to defend your lane isn't helping if they are dying under their turret they are playing careful they are just out matched.
Maybe I need some clarification on this but feeding is not dying to your lane opponent a couple of times, feeding is when you intentionally die to your opponent on multiple occasions on purpose? If my definition of feeding is accurate a lot of people need to learn the meaning of feeding.
Lastly if there is anything here that is wrong please educate me I would like to be a better player and I'm always open to advice from more seasoned players just don't be a troll about it.