Number of members is limited by alliance lvl of administration. Each lvl gives +5 more members. So they invested a lot to get to maximum 45 players. Why shoudl we forbid them that? Because 1 player complains?
As long as i remember, all your post on forum were against alliances and all stuff which makes your solo play hard or impossible. You wish to play solo and kill all players arround you. That would even be impossible if there were no alliances, so alliances dont stop you in that. You kill, you lose army, you cant kill anymore until you recover... Why dont you join some alliance and start playing with other people? I am solo player, i dont like big alliances, but with few friends and expirienced players you can do miracles. Its much more fun and whats the fun to play totally alone all the time.
They game wont adjust to your needs and wishes, try to adjust your gameplay to the game, you will be suprised in results and it will be much more fun.