Yeah I agree once you get a large number of Unit it's becomes super easy, i have to beef up the ai a bit and maybe add some other mechanics to add depth and maybe make map bigger and add other faction or something
makking the map bigger wouldnt fix that because i rly only used the midle part of the map, yoou could also give two options of orders, one that all stay toghether and aonter where all go everywhere, the only way i found to keep them toghether was spaming the click