Veigar is a completely worthless champion atm
Maybe below Gold he's OK because games are super slow for no reason but he's just so shit as a champion right now. Super unreliable. Minimal waveclear. Weak as hell early. Squishy. All he has is some conditional burst which gets bigger and bigger with time but he's never worth picking. Everything else is just too terrible. You can just pick Annie and do almost everything he does better.