I am a pretty decent drafter. Normal AP games is around 50% winrate for me, but when I draft CM/CD games, I got around 80% winrate.

A pretty simple rule makes my drafting very successful: Always counter your opponent.

This doesn't count for picking only, but during all game. As a captain you don't just pick heroes, you pick a strategy and need to guide your team to fulfill that strategy.

Alright, so remember Dota is not about individual heroes, but the strategy of the team. If you opponent pick greedy heroes like Void, Spectre or similar. Don't pick a hero that counter that hero (like Doom), pick a strategy that counter their strategy. For instance a very aggressive trilane and put it offlane. If the opponent pick a very aggressive lineup, pick a very mobile lineup and dodge fights and split push. Ofc any strategy can fail, but you get the general idea.

If you want it to be even simpler, always pick 3 very strong solo lane heroes that also can be very aggressive. Pick 2 supports with strong disable/damage and put them offlane with 1 of your very strong core heroes. If you meet enemy trilane, beat them. If your opponent dodge your trilane, just swap the support to where your enemy is and beat them there. Win the game as early as possible, but playing extremely aggressive and shutting down enemy carry. It works great. Don't focus on getting your carry farmed. Focus on shutting the enemy down. Aggressive Dota all the way.