I am suffering from a downswing and it's really messing with me. Your typical KK cracked by AK or AA cracked by some other joke hand.

Lately though my downswing is a bit more subtle. It's where you estimate someone's range to be A-D (with later letters to be stronger hands) and you hold C. You still consider v-betting to be an overall profitable play but when they call it's fucking D every time. It's messing with my hand reading abilities and I know I've made a lot of money playing poker (about 10k lifetime) so I can't be a complete retard.

Or I'll have someone's range capped quite accurately. Bet the turn with flush draw, river bonks. I bet the river big knowing his capped range can't call here and he insta-calls the river with a backdoor two pair 79o, in a pot with KQ729cc board. Fuck all.

Or I'll make a play knowing some x% of time it's gonna be unsuccessful (e.g., 4 bet bluff, or 5 bet shove with 88 against light 4 bettor and running against AA).

I don't know what the fuck to do. I've been watching videos and I know I've become a better player after watching them. But still I just cannot break this fucking cycle.