LOL. So how many rides did it take to figure out you took the wrong free advice, 10 rides?? Still it shouldn't be that slow, but those tires looked way too fat.
Noglider should hang his head in shame.
So now you basically have an old TEN speed, 8 diff gears with GIs both high and low worse than my SA 5w, 47 to 110. LOL. Without a co-op there it won't be easy changing it. A 50/ 36T in the front would be the first thing to try.
This bike is the other end of not commuter practical, skinny thin tires and still no rack mounts that I see. But still a good ride around bike that looks like a good fit.