Medela pump in style advanced issues?

So I just had my baby 3 weeks ago and this is my first one so I'm still new to breastfeeding/pumping. I'm exclusively pumping at the moment because she is a preemie that was born at 30 weeks and can't be on the boob yet. I have a medela symphony hospital grade pump for when I'm there with her and it's heaven sent..I get all my milk out within 15 min but at home I was given the pump in style advanced by a family member and I just can't seem to get with it. It's so slow and I feel has barely any suction compared to the symphony. I swear I could pump for an hour straight before I get to the same amount of milk I would normally get with the symphony it's so nerve racking and tedious! Is it just me or does the pump just suck I'm so irritated about it and I've looked up trouble shooting problems to see if I was missing something that was wrong with it but nothing stands out