Absolutely. I tried several before I finally got on with one, I was beginning to think it was me subconsciously rejecting tutors because I didn't want to confront my bad bass playing but in the end I found an excellent tutor and I'm thoroughly enjoying it. This is the important thing, if you put yourself through the ringer with study and theory and aren't enjoying it then there is no point. Playing bass should be a pleasure and if learning theory isn't adding to that pleasure then don't do it. There are plenty of superb, innovative bass players out there who haven't got a clue about such things. Mick Karn for instance didn't know a thing about theory, I once read an interview where he said he knew the open strings were EADG but that was it, he couldn't tell you where a C was, in fact when his band (Japan) rehearsed he would often turn up late and the band had already begun jamming a new song, Mick Karn would look at the title of the song and come up with a bass line to it that the title inspired in him, then sometimes the rest of the band would change the song to fit around his bass line, which sounds like a huge faff but they did this because this untutored player, who didn't know a C from a kipper, wrote exquisite, unique bass lines.