You can still do this. There’re loads of free and basic (i.e. easy-to-learn) game engines and you can make games of much better quality with the same effort. itch.io is full of free games made by amateurs.

When people celebrate the downfall of Flash, it’s not because of the games. It’s because the entire internet was replete with unnecessary Flash-heavy bullshit that required constantly updating your browser’s Flash plugins (and all browsers had their own version you had to install and update), and how it was completely unsuited to any sort of UI/UX (e.g. you couldn’t even copy and paste text in Flash pages most of the time). And all that is to say nothing of the gaping goatse of a security hole that it was.

It was cancer. Just because the cancer got you down to your goal weight, it doesn’t mean you should lament the success of your chemotherapy.