How are hurting your fingers? Are you crimping them manually? If you don't have a basic crimping tool or a ratcheting crimping tool, I'd suggest one of those or both. Depending on if you're working with .110 or .187 connectors you might need a specific size of the tool.

I picked up these uxcell 2.8mm and 4.8mm quick disconnects and had no trouble crimping them with the proper tools.