Not using consult because of bad experiences with it in the past makes emotional sense. It is, however, irrational. Events are separate, if you flip a coin and get heads 5 time in a row it doesn’t mean you will get heads the next time nor does it mean you are due tails. Each random event is separate. This means that when you evaluate consult you should not do it based on good or bad experiences but on the expected outcome statistically. If there is a relatively even mix of threats, spells, and lands in your deck (and there should be overtime assuming the deck ahs been randomized) then consult should not affect the mix in what remains of your library. It might remove a restricted card, but that’s all the harm its rational to expect.

If you feel that you get consistently bad consults I think its most likely one of 4 possibilities.

1) You are playing on apprentice. The apprentice shuffler is lousy, that could account for it. This should not effect real life builds.
2) Perhaps it just seems like you get bad ones often. Traumatic events stand out in your mind far more than normal ones. Someone who eats fish a 100 times with no ill effects may get food poisoning once and give up fish. It could just be that the bad consults stand out in your mind so your memory is skewed. Try keeping a written record of every consult you make. This is less subject to psychological skew.
3) Perhaps you don’t shuffle well enough. Before each game give the deck 8 riffle shuffles then a pile shuffle and then another 2-3 riffle shuffles. Additional shuffling can often improve a decks performance. Most people don’t shuffle enough (that’s a fact, not a judgment you can do some quick online research via google to confirm that, although the research I’ve read is for 52 card rather than 60 card decks)
4) Someone in your tournament practices voodoo or witchcraft and has put a hex on your deck. The recommended solution here is to pick up a copy of voodoo for dummies and learn some counter charms.