You didn't mention any country, any jurisdiction.
In general, your country may have laws protecting consumers, and these laws may claim that terms in a contract are unfair and therefore void. Another rule is that usually if a contract contains unclear or contradictory terms, that will be held against the ones writing the contract, and that is usually the business, and not the consumer. (If you are a consumer hiring a builder, and you insist on writing the contract, that may cause you problems because unclear terms will be decided against you).
Apart from that, terms are not unfair just because you are a consumer and disagree with them. They must actually be unfair.