please help with my twinkle

Hello, I need help getting this twinkle oncidium revived asap! I noticed mealybugs over a month ago & used neem oil around the base and wiped the leaves/branches down numerous times. First photo is from a week ago and then today. Just keeps getting browner. ;-;

I’m needing advice with next steps on saving her. Is overcrowding an issue? Should I split it in half and repot? I don’t think it was overwatered because I’m pretty careful about that & have a set watering schedule. I have several orchids and this is the only one having issues. It’s really important to me to save her because I got it at the Milwaukee Domes right after getting engaged there!!