Theres alotta hoops you gotta jump through in order to do anything. In order for cannon to damage heroes, there needs to be a hero close to it, the pylon has to live, the cannon has to live, if it’s target walks out of its range, it will focus something else. The cannon also has a short placement range.
For w, you need 150 mana, need to wait atleast 1.25 seconds, and need to still be in range to detonate it.
For Z to work, you need to not let it get canceled.
For pylon ult to do stuff, you want both pylons up and they ideally should both live for the whole duration.
For the wall ult, you mostly just need good aim and have an eye for where people want to go.
Now all that is not to say there isn’t a huge laundry list of ways to make it all work but compared to something like orphea or jania who just have to press the button. Most of probes abilities individually deal enough damage to 100-0 somebody already so hes not lacking in the damage department. What he needs is just a bit more consistency.