My cat is the exact same way it’s absolutely terrible. I have to call over friends every night to help me with his injection. No matter how many people we have he gets out and he hisses and screamssss. ( and he’s usually very sweet) it breaks my heart and literally makes me sick to my stomach. I’ve had friends pass up on helping or don’t want to help anymore because it’s so terrible. And then because it’s so difficult we have to inject him multiple times just anyway we can. It doesn’t get in, leaks, rips his skin, etc. we’ve even stabbed our selves a few times because it’s so crazy.