Never paid for a subscription and never will, precisely because I want to pay for individual movies to reward them for being good movies.
Not even that, they optimize for acquiring and keeping subscribers. They gain nothing from you watching movies, it is just costing them bandwidth, at least on their ad-free plan, which was the only option until recently. It is completely different from YouTube and TikTok, or even oldschool TV, which get most of their revenue from ads.
They need a few good ones to attract new subscribers, and they do. Stranger Things and Squid Games are really good. For the rest, they just need enough content for people not to cancel their subscriptions.
If you want to encourage quality production, just subscribe for the month they are doing something good, ad-free of course, then unsubscribe. Many people are doing that, and maybe that's what it takes to get them to change their strategy. Maybe not for the better though.