Is travel portal that bad?

Not sure if it’s just me or just a temporary issue but trying to book through CO travel portal is a nightmare.
I look at flights through Google flights and when trying to book the same flights through CO it doesn’t show the flight entirely (many open seats available through the airline website). Some flights I would do multi city to get it to show the flight I’m trying to book but that works 50% of the flights and sometimes just says no flights available. I’m trying to make use of my travel credit and 5x miles but this is frustrating