So pissed

I’m a pretty seasoned nos user, and MARZ is usually my go to. I’ve tried dozens of different brands. Well, randomly picked up a 2000g tank from a head shop and of course it was galaxy gas. I was hesitant to buy it because I already knew a lot of people have had negative things to say about it. It was all they had tho. Well, I have literally been sucking this thing down for an hour now and I literally feel NOTHING beyond the initial little head rush. I barely hear the womp womps and it is just NOT doing anything?

Please tell me I’m not the only one this has happened to. WHAT am I inhaling because it is definitely not nitrous.