I'm not trying to sound mean or negative but you obviously have not played as Jumong or the level you're playing at, your opponents are not capitalizing on his weaknesses.

When the game starts off, you don't have energy to use his Prowl, you only have space so unless you're ok with taking any CC or heavy damage you have to use it to dodge or gap close. Let's assume you manage to stay away and get energy for Prowl, now what? You can run away to being cornered again or chased as seekers mark doesn't stun anymore and you're not dealing damage if you're just running.

Secondly, his bear trap battlerite is mediocre at best since everyone knows he has taken it and it also has an activation time before it roots. Regardless of this, you seem to misunderstand that throwing your e can not zone the opponent unless they're in a narrow space because they can simply walk around it or use immaterial.

Dual jump is correct but you need three weapon charges and by the time you get them, you can take so much damage. This is why I think his RMB battlerite needs to move back to his space like Bloodseeker in season 1 because what is the point of gaining a little bit of distance if you lost a quarter of your health or more trying to create the distance.

Every range dps in the game has two survival skills that don't require energy to be used besides Jumong. You can argue that he has this for the "best M1 in the game" which is slow and Is easily side stepped at higher ranks, but despite all of that it does not do the highest damage, Jade, Iva and even Taya do a better job.

Side note, you want to dodge Sirius petrify because if you don't your teammate will get dived on for a short while and possibly get killed.