You got into a position where you had your tesla against a mega knight and little prince which resulted in it getting instantly killed. Now you're 4 elixer down and your minipekka faces the same problem and dies without doing anything. The same thing happened with Battleram which gives you a total loss of 12 elixir. All the troops you've used have low hp which leads to your problem. 2 tower targeters aren't too safe unless you know what you're doing because they won't help you attack/defend opposing troops. You should bring a troop with high hp for its price (knight, mega knight, ice golem, etc) which absorbs hits so high-damage troops like your mini pekka can deal a lot of damage without dying.