Should any team win in the game that'll be later played today between Brentford and Nottingham Forest, Crystal Palace are gonna move down from their current position in the league standings of 14th to 15th position. However, I'm confident they're not gonna be relegated this season.
Yes I agree with what you said. This bad result will not mean that Crystal Palace is considered to have performed badly and entered the relegation zone. They can still stay in the EPL for next season. This is because their performance is sufficient to make it almost impossible for them to enter the relegation zone.
This is different from Brentford. Currently they are losing 0-1 to Nottm Forest and if they lose then their position will be very dangerous because they are only 3 points different from Luton Town in the relegation zone.