Please do remember that games are for fun as well and enjoying the positive social aspect of league makes the game much more enjoyable. Plenty of games have gone to shit or went into a decline just because the social aspect was taken out of it.
It is bad to chat in something like a team fight, but if things are going passively or barely anything is going on, there is nothing wrong with chatting as long as it is relatively short. People who should really shut the hell up are the toxic ones.
Not only that but you cannot depend on people to listen to your calls all the time in solo queue whether it be normals, ranked, or even bots because you can't make everyone you come across follow a hive mind.
This is not the LCS, and while there is nothing wrong with treating it as such ; you are not getting paid or playing in front of millions of people where you HAVE to take every advantage you can get. Queue up with people who share your mentality as well if you don't like it or just mute your team and pretend that they are not chatting with anyone on the opposing team
People are allowed to make friends any which way the please whether it be online or in real life and they should not be judged for being social, not everyone has the ability to go outside and be a social butterfly or find someone with similar interest so easily and not just because of things such as social anxiety, even outside factors effect it as well.
When I first played on my first accounts, I met quite a few smurfs in normals and arams who were in Platinum, Diamond, and even Masters and challengers all because I chatted when things were lax and learning from them (not being carried) has (briefly) gotten me to Masters