Any advice?

I feel like consistency is an issue, like, one day, I played a few game and my worse game was 18/16, but today my worse game, i went 8/17. Both days i didn't really warm-up cuz my routine takes too long for my friends (its like 15-20 mins in the range) But its also been an issue where my friends play aggressive as shit but I play KJ mostly with them and they want me to play back and for my util, which I can understand but it sucks cuz then they also tell me to push up and be more aggro, and they wont let me play me. What do i do?

its not an issue, every one experiences inconsistency. you could be called a smurf by others one day and bottom frag jett the next game. it doesnt matter, youre supposed to play for fun and trying to be "more consistent" doesnt help. just play like its unrated, youll perform better

Even I face the same problems, i just stop playing for a couple of days and then randomly start at like 8 in the morning and idk how but then im cracked, also playing with friends is good unless u want to win, to win you have to solo queue

Tell ur friends to wait a few minutes bro wtf?

Just solo queue and consistently aim train.