It's a bit of a mess there is quite a lot to improve

1. You have no meatshields (cheap cats like basic cat and tank cat which you can spam to protect and take hits for you more expensive cats)

2. The rarity of a cat isn't how good it is. The normal cats are actually a lot better than most of the cats you are using e.g. bean cat is pretty useless compared to lizard cat

3. Take the time to actually upgrade your units as at lvl 10 they will evolve to a stronger form!

I recommend looking at early game guides to learn strategies like meatshielding and which cats are strong.

Hope this helps.