Is a thesis statement supposed to be specific for English?

Yes, a thesis statement absolutely needs to be specific, and it is completely normal to feel like you are hitting a wall right now. Think of your thesis like a camera lens; if it is zoomed out too far, you get a blurry, massive landscape, but if you zoom in on one interesting detail, the whole picture becomes sharp and clear. When your professor says your thesis is vague, they aren't saying your ideas are bad, just that you are trying to cover too much ground in a short paper. If you were writing about environmental issues, for example, saying "pollution is bad" is a broad observation, but arguing that "single-use plastic bans in local schools reduce waste by twenty percent" gives you a concrete path to follow. To narrow it down, try asking yourself the "so what?" question. If you have a general topic, keep adding "because" or "by doing this" to your sentence until you have a clear argument that you can actually prove with evidence. It is much easier to write five pages about one focused point than to struggle through a mountain of general information that never really goes anywhere. You are essentially setting a map for your reader, and the more specific your directions are, the easier it will be for you to write the rest of the paper without feeling lost. Take a deep breath, pick one small angle that you find genuinely interesting, and focus your entire argument on that one piece of the puzzle. You have got this, and once you lock in that specific focus, the rest of your essay will start to fall into place much faster than you expect.