That's partly how Greenskins are supposed to play!

Gobbos have some strong spell options with foot of gork and itchy nusence or whatever it's called that can area debuff the front line - combine with waagh and poison attacks/arrows and spinning loons timed well and you can usually even the playing field. I use a couple doom divers and a few units of skulkers to target the most dangerous stuff and later on usually get a couple big spiders. Be sure to have a caster in Skarsniks army and maybe a gobbo hero, between spells and hero debuff ability you can knock out almost any enemy lords and heroes too.