dont act like you're surprised, other ppl may lag as well but not as much as you do, you two are always between 350 (rarely) and 600, plus you two play like nothing when having 460-590 ping at times, killing ppl like nothing while you cant be hit at all, just fix it cos its not only VCDC server, its CTF EC EA etc
since you're mostly marginalized in our community cos of this issue and i guess you're aware of it, try fixing it or dont play at all.