My kitten is a shit.

I adopted a kitten almost 6 months ago, making her roughly 9/10 months old and I’m losing it. While she’s very sweet, she is usually starting shit around my house. Knocking stuff off the counter, trying to eat human food (I can’t leave any food out on my counters or she will tear into it), constantly darting across the room and smashing into anything, and tearing up the corners on anything with fabric. I have had one other cat for about 6 years and haven’t ever had these issues before and am not sure what to do. For context I am a single mom with 2 cats and a dog. 1 cat is 6, the dog is also 6, and the tiny human is 4. Am I being impatient? Is this just regular kitten behavior?