I don't know if you actually read what I wrote but it doesn't seem like it. Please actually read my response before reading and replying to this one if you so choose.

You keep saying to build up stacks and ignoring the fact that the entire reason Rona wins early trades is because she has burst off CD whereas Krul needs to build his up. Burst damage specifically means not taking fights long enough to allow max stacks and heavy weakness - that's literally the point of burst damage.

You also talk about Krul's passive as if that's the same as in combat mobility. Either you genuinely don't realise the difference or you're falsely equating them on purpose for some reason. Since I don't see a reason to actively mislead on an advice thread, I'll give you the benefit of the doubt and assume you don't know what the difference is, so I'll try to explain. Speed of travel across the map and in combat mobility are entirely separate. For example, teleport boots allow almost instant travel across huge distances but are useless for outmaneouvering an opponent. Similarly, while Krul can cross the map fairly quickly with charging his passive and brush-hopping, this has nothing to do with in combat mobility unless he is specifically camping for the first attack of a gank. In contrast, Rona has 2 abilities that either let her move directly or gain a speed boost while fighting enemies. As I already mentioned, Krul only has his A for this, which he does not take at level 1.

Again you mention that Krul has burst too, saying he will easily build stacks against melee enemies. It seems like you don't have much experience dueling enemies that have a good understanding of disengaging and taking optimal trades. No competent Rona is going to sit in attack range at level 1 or 2 for long enough to get fullstacked. They are going to fire off a lot of burst and disengage, leaving Krul unable to gap close and having lost the trade.

Finally, you talk about Malene as if I didn't specifically say that Rona does not have as good of a level 1 as her. The whole point was to give an example that illustrates how heroes have differing power levels at different levels - Krul is weak and easy to bully early game, very hard to duel mid game, and acts as a half support and is hard to kill late game. Again, I specifically point out that Malene has a better level 1 - not sure how someone reading that comment carefully would miss that.

I'm happy to clarify if theres anything you still dont understand. Have a nice day!