Just got an alignment and she’s still pulling to the passenger side

So I just got an alignment at pep boys and I drove it maybe 3 miles and I still feel a heavy pull to the passenger side. Is this a suspension issue. Or did they just do a shit job doing my alignment. I have after market tires and rims but when I bought the truck I never had an issue with this.

 

That's called a "toe and go" alignment, the cheapest and crappiest version of an alignment. Compare your before and after numbers, and all they adjusted was toe only.

They'll have to redo it and set the camber and caster properly and evenly, in addition to setting the thing up to drive straight.