Yes, obviously. You already said that you willingly reward servers a large sum, regardless of whether that service was good or bad. PT Barnum had people like you in mind when he uttered his famous quote about there being one born every minute. And I am not an alcoholic, so I do not partake in your type of drinking.
The service is NOT performed if the server does not perform all of their service. Why is this such a difficult concept for you to understand? I can see when someone is overloaded but trying to do their job vs simply not caring about anything. I've even given a higher than 20% tip when there was only one server in a restaurant and she was working her tail off trying to keep up.
And I bet you that a lazy, rude or otherwise substandard server knows why they do not make the same amount in tips that one of their hard-working co-workers does. There is only once when I reported a server to the manager and I only did that when I went up to the register to pay my bill and the person (not my server) asked if everything was okay. I briefly mention my experience and she summoned the manager.
Don't try to impress with your attitude of giving the same no matter if they're screwing you over or not. That is just nonsense. If a server wants a decent wage they need to earn it by doing their job. Restaurants should do away withe the tipping thing here in the US and pay people a decent wage where this tipping thing is figured into the bill, the way it is in Europe.