My game already crashes for the 2nd time today or so, even though I had a good internet connection all the time and my PC has a high performance.

You should definitely mention Strix. It's impossible to kill him unless you are a tank. Neither on long range nor on close range.

I'm not playing flanks wrong. It's just that a good Strix player that isn't stupid will anticipate the flank coming, and even if you surprise him, he just quick scope + flare = DEAD. Literally if you have aim, you are completely untouchable if you stay in the backline and just shoot, keeping track of flanks. Kinessa can easily be pressured out by flanks forcing her to retreat and go out of position. Strix can just demolish them for some reason.

Because Illuminate, as we all know, saves you from being demolished in less than a second. And it's not like more important items like Cauterize, Wrecker, Resilience, etc. exist or something, which you need to buy first.

Strix needs even more nerfs. His real problem is the braindead FLARE AND BALANCED, 2000 (2600 with headshot) damage in a split second plus 400 burn damage over time. How? HOW can this exist in the game? Unless you are a tank, YOU ARE DEAD immediately. Strix is being picked and banned on literally every map in the PPL, even on non-sniper-maps like Ice Mines, Warder's Gate or even Brightmarsh. It's completely impossible to flank him. Just remove Unauthorized Use. Crackshot is fine in my opinion because it requires you to hit the quick scope, which ain't that easy. But with Unathorized Use EVEN IF YOU ACTUALLY MISS you can braindeadly flare your enemy and spam him to death with the pistol, which DPS is about the same as Andro's revolver. And EVEN IF HE MESSES UP, he can just ult and get 3 seconds for free. I want to hear a clear answer from a game designer: How is a flank champion in this game supposed to kill a Strix?? How?

I often had to deal with pesky Evies playing Kinessa or supports so I can give you some tips on how I normally deal with Evies.
First of all, at the start of the fight, stay somewhere back before you go into position and find out, where she is, before you go into position. Secondly, you need to understand how Evie works: She shoots, blinks above you, shoots, soars to you, shoots -> you're dead if she pulls it off -> blinks back (4 seconds cooldown). So if you see that Evie blinked somewhere, remember where she blinked from, camp her spot, and once she blinks backs, kill her (works best with Bomb King, Kinessa, Strix, Drogoz too with Salvo Fire Spit). The most important tip is to not ignore an Evie. If you ignore an Evie, she will kill your entire team. But she only has 1800 hp, oftentimes it's enough to shoot her once or twice being Drogoz for example to scare her away, and she will blink back, and you'll be safe for 4 seconds. Just don't ignore her and shoot her everytime she goes in, she'll blink back really fast.
Another important tip is to move around unpredictably and wiggle left and right, so she misses her shots. It's pretty hard to hit shots with her, so try your best to make her miss. Every missed shot costs her an entire second to finish you off, which is a lot of time. Don't be isolated and stay close to your team so they can help you out. What I like doing as Kinessa is if I expect an Evie to blink in, I preemptively aim into the sky where she will probably blink to. That way I managed to kill Evies several times the moment they blinked above me and my teammtes. But even if you follow these tips, it can still be frustrating to deal with a good Evie, she is just really strong.

I like the changes. The ults are definitely not the main reason why they are overpowered, but still the nerfs will affect them. Especially I like the change to the lian ult, the most braindead auto-win button in the game, which even hits you if you are clearly behind a wall, its hitbox is just insane. To be honest, I think her ult will be somewhat underpowered after this change, but that'S perfectly fine, because the rest of her kit will remain as overpowered and braindead as before. When it comes to Cassie, it won't affect her too much. The use of her ult will just be restricted to revealing enemies, which on its own is already a strong effect. But Cassie at least isn't as stupid as Lian, she can't just deal 2400 damage without aiming at all (Enlightenment doesn't require actual aim due to its ridiculous hitbox).

What about my Kinessa guide http://oldforums.paladins.com/showthread.php?92738-Guide-for-Kinessa ?

Winning after being 3-0 behind
Sticky bomb noise from bomb king is really satisfying
Hitting three or more people with a combustible fire spit
One shotting flanks being Kinessa, especially Evie
hitting multiple headshots in a row, the sound of it is really satisfying

Stuns aren't too big of a problem because you can predict when you will get stunned in most cases (Inara has wind-up time before she stuns you, Damba has a clear sound cue so you can predict when he will stun you., Ash ult gives you also enough time to react, except if there is a low ceiling above her, Furia beam, just do go into it, Vortex Grip, don't go close to Khan if you aren't sure whether it's on cooldown or not. The only stun I find really stupid is Io, because you can't predict when it will stun you, the dog can chase you down even if you are far away, and it's just really random and unpredictable, I think the dog shouldn't be able to stun)