It is extremely easy to argue. You're wrong.
Using AMR's best in slot, double-valor-upgraded, "offensive" (crit > all) build, you can hit 40% crit and 10,400 AP. (Getting more Crit sacrifices way too much Str and you end up losing damage) Based on wowdb's formulas,
a) TC does 117.6% AP damage and another 420% over 15 seconds. T
b) Revenge does 374% AP on the main target, and half to each of two more.
On five targets, that's 357,240 total including everything.
Now filter in +40% damage from crits and that's 500k damage. That's a lot!
Except your max health is nearly 600k and you still didn't make it. A sixth target adds one more TC/Deep Wounds hit and you still don't make it, although admittedly you're closer.
All while assuming you have the maximum technically realistic crit from every single possible source, including double-valor-upgraded mythic warforged with a socket in literally every slot. Is someone who's really mostly interested in PvP going to have this? Actually, no, is ANYONE going to have this? Isn't that nearly mathematically impossible to have? Take off the sockets and warforged only and your AP/Crit drop by 8%/5% respectively, and the 5-target damage drops to 445k, far lower than your max health.
Also, this doesn't count damage reduction by armor, dodge, parry or block. Which in PvP a lot of your targets will have.
Also, this comparison is pretty disingenuous. Most of the listed damage above, namely sixty-one percent of it, is Deep Wounds over fifteen seconds. Some of those targets will be healed in that time. Others might have shields up that prevent the damage from TC and by proxy Deep Wounds. Or, you might be dead in less than 15 seconds and not get the full effect of that 3% leech.
Which we won't even have in the first place, making this irrelevant.