While I wouldnt have tipped this person, you still tip during regular 'bad service' (like slowness or burnt food or whatever), because even though things didnt meet your expectations doesn't mean you should take advantage of the fact that the state makes it legal to pay servers only $2 an hour. The prices of your shit meal were lower because of this, so you should at least make up the difference to a minimum livable wage, which is the cost it would've been if the state wasnt retrograde.
Unless of course you think people who are bad servers don't deserve to make minimum wage.
Unless of course you think people who are bad servers don't deserve to make minimum wage.