Sigh, the problem with assassin haters is they don't see how to beat any assassin.
Mostly all assassins wants you pass the halfway mark in lane because it gives them more room to work with so freezing hurts them heavily and worth more then trying to just get every cs, if they roam tell your team they're mia and farm while you can.
Main two things you have to do, which you should do vs anyone is play safe and harass as much as possible, while vs each assassin during lane phase(before first tower is taken):
Akali- harass as much as possible when she tries to farm/pre-6 and watch your mana try to keep it above 60-70% between every harass and never stay pass the 2 walls in lane pass lvl 6 unless you have jungler aid, and buy a pink. If she roams/dies shove winions into turret and hurt her farm.
Annie- be on guard when she has 3 stacks and flash
Diana- same as akali w/o the pink
Ekko- A bit hard since he has Q and blink gap close but try to trade with him when Q is used since he won't have it even if he E's you.
Fizz- trade without staying in his Dash range, if he used playful tricker it's time to trade with him.
Kass-Harass as much as possible pre-6, while he has some good burst damage I find his damage not really great.....
Katarina- keep her off winions so she has to use Q to farm, try to trade when her Q is used but not on you.
Kha- try to trade when near winions and his W is down(so try to keep him off winions so he uses W to farm)
LB stay out of her W range if you can while you try to harass her if she uses W she can still mark->chain but do try to punish her while W is on CD
Nidalee- Dodge the spear and try to harass when you have minion advantage,
Patheon- You need a jungler.
Talon- Go for the trade when his W is down.
Yasuo- harass with AAs when his passive is 98%-full, Do not be in front of your minion wave however, If he has wind wall use 1 spell only if you're near 95%-100% mana, if wind wall is used don't mind and wait until it leaves then it's your chance to harass him, never try to finish him off in 1 go.
Zed- Harass/trade with him for using the shadows offensively, dodge the shuriken and try to zone him if he's below 30-40% hp and you have double his HP instead of trying to kill..