So my small herb and vegetable "garden" (more like balcony) has been infested with mites, thrips, and aphids. Almost every single plant I have has one or more of them, save the chives, tarragon, oregano, and cucumbers (although my tarragon hasn't grown at all). Anise basil (x4), Genovese basil (x4), purple basil (x2), pesto perpetuo basil, tomato, lettuce, parsley (the soil is full of mites) (x2), these are all infested with one or more of them.

Now, the question is, do I go buy some pesticide so that at least I can get rid of them and still use my herbs (although now I will have to wash them carefully each time), or you think this is a lost cause and I should just throw everything out and start new? My pest problem has been getting worse and worse, and this year, while I overcrowded my balcony with plants, it has been the worse.