Schecter has been in the game a long time. They started making replacement parts in CA in the mid 1970s (along with Mighty Mite, Charvel, Stars Guitars, DiMarzio, etc...) and started building complete instruments sometime at the end of the 70s. At that time, the complete instruments were essentially Fender copies that were very expensive and there was a very high demand for them. They were apparently well liked enough to be seen in the hands of Pete Townshend, Mark Knofler and Lou Reed, to name a few.
Once they reached a point in the early eighties where they just couldn't meet demand, they sold out to a bigger company who sent the manufacturing offshore. There have been several changes of ownership since. As far as I can tell, the quality control has remained fairly high throughout the company's history and their product line offers a lot of models that are very nice for their price ranges.
A friend of mine plays a Diamond Series that I have used a couple of times. While I'm not a big fan of EMG pickups, personally, I thought the bass was solid and played just fine. A perfectly nice instrument.
Your friend who turned his nose up at your Schecter has not, I'll bet, ever played a gig with one and is basing his opinion on nothing but the instrument's price range. That's a shame. Snobbery doesn't contribute anything to music, nor does it do anything to help any sense of music community. Don't let him or anybody else tell you what bass to like.