McDermott felt his side were not at their best until the second half.
"First half we were a little bit too respectful, in the second half I thought we deserved to win," he said.
"In any sport what you need to do is stay in the game, I just said (at half-time) that you are right in the game at 1-0 and if we can raise our tempo and play the way we can it will give us an opportunity.
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Network Rail is to reopen the level crossing in Barns Green in West Sussex on Thursday this week, following a fatal accident last month.
James Wright has Monday's forecast for the east of the region.
James Wright has Monday's forecast for the west of the region.