Ronaldo scored a brace as Juve took a 3-1 lead, only for a late double from Gervinho to secure a draw for Parma at Allianz Stadium.
While the Portuguese star was glad to get on the scoresheet, the 33-year-old rued the result for the league leaders.
"I'm happy about the goals but not the result. This is football," Ronaldo told DAZN.
"We dropped back in the final few minutes and Parma capitalised on our mistakes.
"I don't think the last few results are because of our heavy workload. We're relaxed and not worried.
"We're confident in the ability of this team and its technical quality, as well as the coach and the staff."
Despite the draw, Juve are nine points clear atop Serie A and unbeaten in 22 league matches this season.