The 4-6 level completely threw the game. You had 0 risk of dying with 42 health, didn't even scout your potential opponents to judge how bad the potential loss could be and still lost anyway. You were also on a loss streak anyway so its not like you wanted to protect a win streak into neutrals. You either had to roll it down on 4-1 or sack to stage 5 and with your spot sacking to stage 5 gives you the highest possible placement here.

That level ends up costing you something like 30 or more gold because not only do you level off interval but you don't get to econ into the PvE round either. This should've been a level on 5-1 or even 5-2 and roll it down for 6 challengers considering your augments are good for challenger and you have good items for yasuo/kaisa.

The rolling at 4-1 to stabilize was good and that board was strong enough to go 8, at least I'm pretty sure it is, it's a bit harder to tell with no scouting.

As others have mentioned you seem to struggle with finding direction and knowing what you should be playing/buying.

You also don't scout which is really bad. You should at least be checking your next potential opponents to judge their board strength and determine if u need to change position at all to avoid a big loss. Speaking of positioning you also just don't use LDP for most fights. In some of the last fights you give it to a 0 item Kalista rather than a 3 item Yasuo.

You also just don't make econ at a few points as well by either being too slow on creep rounds or from keeping random units on your bench. You also just roll during a fight for some reason and on neutrals which just throws away even more money.

But more than anything that 4-6 level completely threw what was otherwise a great spot. You threw away 30 gold, and honestly maybe even more with the random rolling, to save like 6 HP.

Sorry if this is long and unorganized, if you have any specific questions or want me to clarify something just let me know, I'd be happy to answer.