In latest Alliance war, this happens. One admittedly strong team defeated 3 strong team attacks between me and other player taking almost no damage. There is obviously a problem there.
Primary problem is that Lady of Lake is far OP. The swords’ ability to remove mana is especially bad, because you cannot ever fire your own specials.
Correction required of you immediately:
Remove swords’ ability to remove mana or limit the number of times per battle her special can fire, or just make using her in war an automatic-lose condition for a defending team.
Implement immediate correction of starvation boards. One of my attempts i went in full opposite color from her to try to knock out quick. And of course board started with 2 tiles of that color. I think I only was given made 1-3 matches on that color the whole match and never fired a special.
Correction required on this problem is immediate. Failure to do so will be seen as an open statement that your game is intentionally playing unfairly and should be removed from distribution because of such.