no , you are not a terrible person at all....
but you should be aware taht introducing formula too early can disrupt or stop succesful breastfeeding
also, re a routine: bottle fed babies still need feeding on demand,IME and IMO. a new born has a teeny tiny stomach, and cannot be left empty for long ... formula will not give you a baby that goes 4 hours between feeds from weeks old,unless you are very, very lucky!
with routines, you think you crack it, then baby gets a cold, or has immunisations,or a growth spurt, or cuts a tooth and it all goes up in the air.....
i have bottle fed two babies,and it has had its drawbacks
obviously you iwll do what you and your family are comfortable with, but i think with newborns, you have to accept they need to feed more, breast or bottle, than you can ever have thought possible!