I’ll keep it short on account of the anger.
Went to Home Depot for the final time, got everything I need to finish project sink.
Got home, found a vent I didn’t account for, had to change plans. Instead of replacing the pipe down into the basement I’d stop short of the vent. Long story short it’s all back together after an additional trip to Home Depot and not only does the sink not drain but there’s a small drip that I can’t fix until either my full sink drains or drips all over my floor.