To answer you actual question:
No not all petsmarts suck. Some have great managers and staff who genuinely care about the animals health and well being.
I hope your local store is one of the good ones.

If you decide to buy from them, it's not bad of you. They're a chain so people bad talk them, everyone would rather support the mom+pop store around the corner but sometimes petsmart is the only one who has what you need.