You have watched four seasons and you still cannot say much. That is not a failure of effort. Watching with subtitles in your own language is a reading exercise with sound in the background, and your brain will always take the easier channel.
Subtitles decide what you are actually practising
Subtitles in your own language: you are reading, and the audio becomes atmosphere. Comprehension feels high and almost nothing is learned. Subtitles in the target language: you are reading in the target language and matching it to sound, which is genuinely useful. No subtitles: hardest, and the only version that trains pure listening.
Input without output does not produce speech
Watching builds recognition. Speaking builds production. They are different systems, and hundreds of hours of one will not quietly become the other. Pair every viewing habit with some speaking, however small. Describe the episode out loud afterwards in three sentences. That is where watching starts paying into your speech.
Rewatch a short scene instead of streaming hours
Take two minutes of dialogue and watch it three times: once with target-language subtitles, once without, once shadowing the lines aloud. That is worth more than a whole episode consumed passively. Pick scenes with ordinary conversation, not action or plot exposition. Two people arguing about dinner teaches more than a dramatic monologue.
Choose by dialogue density, not by how good the show is
Comedies and domestic dramas are full of the language you will actually use. Thrillers and fantasy are full of vocabulary you will never need and long silent stretches. Familiar shows are best of all. When you already know the plot, your attention is free to land on the words.
Watching is excellent for the ear and useless for the tongue. Keep it, shrink it, and put a few minutes of speaking on the end of it.