How do you punish Garen in lane or at all if your not a ranged champion. I can farm easy enough, but when I play 
even if I get a gold lead it feels like Garen can just derp in lane as if it doesn't matter... How do you lane againt Garen?
Garen vs Malphite is generally a farm fest. You can't really punish each other unless one of you makes a pretty bad mistake. Focus on farming and keeping good vision to prevent being ganked. To win that lane you will likely need help from your jungler.
When he try to do dmg just fight under minions and when he attacks u either trade or back off
Garen is easy to lane against since they kited in every time fight
Garen's actually surprisingly easy to stat check early. A few heavy trades and the Garen player might learn to back off. That would lead the rest of the landing phase as a general farmfest.
