biggest bug ever on low lvl acc

so i played on my low lvl acc and for no reason i died 5 times in a row. first their kassa with 28 ap did R Q E and i died when i had full hp. FULL HP. as a 6 year smurf i can tell this is a bug since he cant one shot like that with 28 ap at lvl 6. and then their jhin crit 364 dmg with his 4th basic, he had 152 dmg with a normal crit that would be 152*2 which is 304 dmg. and his passive crit is dealing 25% dmg less so that means he should deal 228 dmg and like every champ we got base armor which would reduce it by around 25% too so he would deal 152 dmg with a crit. this is a massive bug on kassa and jhin. and no he did NOT have infinity edge or any crit dmg runes since he was lvl 10 at most. fix this please