This Is Your Bloody Valentine is poor. It sounds like the band (particularly Dave Conway, the singer at that time) are imitating The Cramps or The Birthday Party; imitating them badly. There are clips
here (try Forever And Again, to hear their camp gothic sound at its worst).
However, their earlier work isn't all bad. The Sunny Sundae Smile EP also features Conway on vocals; he sings normally on it (in fact, he sounds like Shields), and its very, very good. The title track, Kiss The Eclipse and Paint A Rainbow are as good as anything from Isn't Anything/Loveless in my opinion.
Then, Conway left, and they made Ecstasy and Wine and so on...