I tried a second Dorco blade... it was better, no tugging, but the shave was still mediocre. Maybe double edged razors just are not for me. The shaves I'm getting are not as good as a modern razor or a disposable, I don't mean in terms of closeness- they are close enough. Just uncomfortable.
Not sure how you long have been DE shaving, but give yourself at least two months to adjust.
Nobody can recommend the best blade for you, but some blades that are generally accepted as middle of the road, are Israeli Personnas and Astra SPs. Note that some vendors sell the Israeli "Crystals" as Israeli Personnas. In my experience, these are not the same blades.
Of these two, the Israeli Personnas and Astra SPS, I have a strong personal preference for the Personnas. But again, never mind what someone else wants to recommend to you ... it is your face, not theirs. That includes my advice as well.