Going through the same experience, it can be a bit maddening. As a trombonist I learned to make adjustments on the fly if I detect that I am out of tune with my section mates. My teacher in college told me that "trombone is the one brass instrument that can be in tune all of the time", which is true. Brass instruments with valves require a lot more compromises.
For example, usually you would tune the first valve slightly flat, so you have an in tune 1+2. This way you can tune the 3rd valve to have an in tune 2+3. And then after that you use the 4th valve and then 4+2 before returning to open.
Definitely check out the resources linked above, as they really can help later on when you want to avoid having to lip things up or down.
Sterling / Perantucci 1065HGS Euphonium, 1952 B&H Imperial Eb Tuba, and a bunch of trombones.