Looking for Ranked advice!

Dear Summoners,

I recently started ranked, albeit rather late into season 7. I did my placements and landed into Silver IV. I did not seem to struggle at all in placements, but did get d/c's in three of my placement matches. (bummer) I played a total of 18 ranked matches and have consistently done quite well in my own capable eyes. _I'm a OTP with _ I love these champions as they're really fun and I find myself to be consistent.

I'm looking to improve my play and learn more about these champions; I don't play a lot of ranked sense I know the atmosphere is different. I'm not a fan of the low elo community. I really just don't understand why players choose to devolve and reduce their own IQ, by not being a team-player. It's hard sometimes and I struggle with the mentality aspect of ranked. _I always focus on my play, but I'm looking for something deeper. _

I also play with sub-par computer specifications. I usually heed to a stable 60fps, with 60-70ms latency. Not sure if this is important or not, but of course gpu/network performance is quite important in an RTS.

If anyone with superb game/tacit knowledge elaborate on my games, or evaluate my performance with constructive feedback? Maybe explain some aspects for me that I can't even perceive yet?

Warmly, Solo Queue Team Player

p.s. I don't like any other role besides jungle Q.Q