If Aatrox is in a good spot, why does...

Why does Aatrox have neither good base stats nor good scaling? Im a Diamond player in euw, who plays Aatrox usually (for the case i have to play toplane). Not because i think hes a great champion. Hes just the one i have most experience with concerning matchups. Recently i had 2 ridiculous games emphasizing how weak Aatrox actually is:

1. Aatrox vs. Renekton: I knew this is a matchup not in favor of Aatrox before i went to my lane. However, due to misplays of my opponent i was able to get a 2/0 and 20 cs lead over the enemy Renekton. I was about to hit level 9, when my opponent just got his level 7. I had a Botrk and Renekton only a chain vest and a giantsbelt. At this point, any other toplane champion could have easily beaten the Renekton 1v1. I engage, hit the knock up, ult, hit my e's that fight. But, Renekton killed me 1v1 and survived with 33% hp. Is this balanced, when you are able to outsmart your enemy, but not being able to snowball on it, because the champ you play has no great scaling early on? Especially on toplane snowballing is so easy for the champions played on this lane. But, Aatrox can't.

2. Now this matchup Aatrox vs. Tryndamere was very interesting. I knew my enemy ran 35% crit in his runes. With his passive he could have theoretically 65% crit early on. I tried to deny it as much as possible. We both had our fails in lane, it was pretty even. What did tryndamere do? He rushed phantomdancer as first item. He had base 70% crit 100% with passive. He simply waited till he doesnt crit a minion, used e towards me and made me halflife with 2 crits. Now Riot, why does a champion, who has a kit like tryndamere or: Why has a critbased champion MORE base health and MORE health per level, than a champion like Aatrox? He does not need to build any AD, since he deals more damage with crits only, while he has more HP as well.

You nerfed Aatrox's passive and E to offer more counterplay against him, but he lacks the ability to counterplay opponents as well. In his champion spotlight you presented his strength in outsustaining a Tryndamere, but in reality he is not able to duel him the entire game. Building an Item, which should synergyze good with Aatrox like spirit visage, makes him so weak in any fights offering nothing special for his team beside a knock up and a few slows with a long cooldown. You HAVE to go a maw of malmortius to be relevant as a fighter ending up being squishier than other champs, who can fulfill that role.

Riot likes the idea of adding a fear on his ult. But, they say it should be something a tank should have. So, why dont you add it with a scaling duration on his fear dependent on how much armor/mr/hp he builds similar to the scaling on Randuins for example?

Or give that Champ, who is considered as a Tank second, not ridiculous low base/scaling hp (far lower than a crit champ, which you actually should beat concerning lore).