Don't give up just yet. Adjust your fit. It makes a huge difference. Also, feel free to switch back to regular pedals until you get more comfortable on the bike. I remember the first month or so on my road bike. Wow, was it a strange feeling compared to the MTB. It did take some getting used to. Now I almost never ride the MTB despite riding it for nearly 15 years.
Once you adjust the fit, find a good saddle, and get used to traffic, it is a really, really fun way of exercising and exploring the area.
I have a Brooks B72 and it is insanely comfortable. The stock saddle was a torture device. I raised my bars nearly 3 inches with the stem riser and haven't looked back. It is a cheap and easy way to get a more upright and relaxed geometry without spending a ton of money on a new bike.