By actually getting more confident in yourself. By building what I call internal validation, meaning you're so grounded on your path & purpose that it doesn't matter if you got 0 girls or 10 girls wanting to suck your nut out of your balls. You care about your own opinion over the opinion of others. That's true abundance.

Practice shutting up and watching what people are doing

Most shit tests can be passed if you are just receptive for what someone’s communicating to you

Do standup comedy. Your wits will quicken and you'll slowly become numb to people's reactions.

Watch stand up comedy, especially handling hecklers.

The principles are few (A&A, D&A, Reframe/Pressure Flip, Ignore), the methods are many. When you become the game, you'll only need Amused Mastery to control the Frame and destroy shit tests.

Most of the time, it's not even what you say, but how you say it. The most important thing to shit tests is to not get reactive.

Another thing is to know when the shit tests are becoming rudeness and just ignore the cunt. Some uggos are not even worth bothering with.

It crosses the line when it makes her unattractive to you.

A few things.

You just cannot learn without practice, whatever you read wont stick unless you put it to use. Dont just game women, game everybody. Get into some good banter with guys, chat with old ladies and the cashiers. This will teach you how to get in state faster, and gramps might have some verbal jiu jitsu for you to contend with.

Doing standup or improv is a great idea if you wanna go hard and really get results. Im too busy (lazy) to get into that.

Perhaps most importantly in your case, is learning not to try so hard. Inner game is a concept for a reason. Being confident and feeling good about yourself is the baseline for solid game.

Amused mastery is another good concept to understand to get into a better state. You shouldnt really aim to "have a quick response" to shit tests, because worrying about that inherently means you're taking women too seriously. In the end, how you behave and speak trumps the words you say. So, the right overall mentality is what will help you pass shit tests like a breeze, not canned lines.