Bitter or Better?

For most of the 15th chapter of Exodus we find Moses and the Israelites, having a hearty praise party in honor of what Yawheh has done at the Red Sea. That party goes on for the first 21 verses. Yet in verse 22 things change and by verse 24 the complaints are in full effect.

The problem they were complaining about had to be small compared to parting a sea, yet the people complained. I don't think people have changed much here in the 21st century. So when are we going to stop acting bitter every time there is a bump in our road and start acting better knowing that the same force that parted the Red seas of our lives can handle a cold sore?

Help a brother understand.