Racing is training, and training is racing.
I'm in your boat right now. Two races on the weekend doesn't leave much for hard work in the week. Either 2X20 on Tue/Thur or VO2 on Tue / 2X20 on Thurs. And that is really all I can handle. Plus 2 hours L2 on Wed and a recovery ride Fri. Monday off completely.
Think of the races as part and parcel of your training plan. Or, like me, start your build at the beginning of January - but that's hardly help at this point.
One of the first things that goes in my schedule is those 3-4 hour endurance rides. I don't race that long anyways. But, when there is a break in my race schedule, I devote a bit more time to work on that long endurance.
Your race prep is also borderline too long. Anything over an hour is iffy. Take a day off, tone done the long ride, and spread out the intervals would be my advice.