Whoever doesnt use Jagdtiger/Elefant in a serious 4vs4 is pretty stupid... so that counter will be there all the time.
lots of maps have poor sight and good flanking. Lanzerath ambush is not a good elephant map and neither is city 17 east side. Even steppes middle vp is hard to hold against this because of the hedges.
Neither side strat is guaranteed win of course but skilled players can made them both work.
I take your point that some axis teams have hig streaks but there has already been much discussion of the fact there is more axis play and so a higher number of good axis teams around and that lower level allied teams are easier to beat. In high skilled hands big team allies overpower high skill axis and the Jackson / rifle play described above is part of the strat used