You and I are in pretty much the same situation.
I joined wgt 3 years ago, played for a few months and wandered away. When I came back, wgt had changed its level/tier system and I was a Level 30 something master with starter clubs and I'd never broken par.
Don't sweat it too much. Whether you're a high level/low tiered player or a low level/high tiered player, you're sure come across someone who finds it suspicious.
If you like the game and you keep playing, eventually the level vs tier thing will equalize. Until then, yes, you're at a disadvantage because you have lousy clubs. If you're the type of person who likes a challenge, it will make you a better player in the long run.
Good luck and have fun.