tried tft again after so many patches i seen different elements and stuff but still garbage

enemies spamming vayne in a corner while my malphite ults her and does 0 dmg but also doesnt even auto her he instead walks away. yep thats fair enemy gets better rng therefore instant win. i dont know why the my team dont focus the vayne if she is obviously does the most damage. plus i rerolled a billion times and i still cant get the champ i want.