On the other hand, I've been living like that all along and haven't seen any major results.

Not sure what the results look like. More often than that, the fantasy of future is far more fascinating than the current reality. Maybe you aimed high and shot low. I don't know. Ultimately, it is the decision in your mind to shift your own focus.

Again, if you are NOT comfortable, make change. If you can't make change, surrender.

More importantly, don't take my word for it — try all kinds of experiences. Eventually life shows that none of them matters.

It doesn't mean I will throw my morals out completely, but perhaps nothing deserves to be followed dogmatically

Drop the perhaps. That's the truth.

If being a bit of a dick will get me to enough abundance to shift my thinking to abundance mentality

Luckily, you are the decision maker. There is a book I read years ago and even recommended others. It was on how NOT to be nice anymore. I don't remember much of the book but one of my friend perceived it as "I should be an asshole." This perception only ruined his future days.

Everything has to do with our own perception. You see me as someone attacking you. Or simply someone pointing you the truth. The choice is always yours.