Whenever you're facing a hard match-up , always try not to give kills to the enemy. That will require you to farm under tower and give up some cs . your death value is 300g , so there is no need to give the enemy 300g for few cs worth of max 60 or so.
doing so will force the enemy to be greedy and do mistakes that you can benefit from, also helping your team to carry if they're doing good in other lanes.
laning phase matter but team fights and mid to late game is game chaining. once you have less deaths to the enemy you can win more games .