I can think of two possible claims.
(1) You may be able to terminate your lease early without penalty if the Landlord has not provided you with a habitable dwelling and you have demanded that the Landlord make repairs. All residential leases - regardless of the Lease terms - have by law an implied warranty of habitability. The Landlord must provide a dwelling fit for human habitation. The lack of a working toilet - if it were the only one in the apartment - would likely be considered a breach of the warranty of habitability. However, since the Landlord has already repaired this, you cannot use it as a basis to terminate the Lease now. It's possible that a lack of working electric outlets could qualify but this would be very fact specific.
You also may have a claim under the Texas Deceptive Trade Practices Act since it appears the Landlord made a significant misrepresentation that induced you to lease the apartment. You may have a claim for damages against the Landlord, and if your claim is meritorious, I suspect the Landlord would be amenable to a settlement that included the early termination of your Lease.
If you're simply miserable and want to move, you could give the Landlord notice as required in the Lease. Even though it's not stated in the Lease, the Landlord has a duty to mitigate damages and promptly advertise and release the apartment. Once a new tenant leases, you are no longer responsible for the rent.
A year is a long time to be miserable. Since there's a limit to the details you can provide in a public post, consider consulting with an attorney to determine all the options available to you. Sometimes a demand letter sent from a lawyer threatening litigation will go a long way towards resolving an issue, and that isn't very expensive.
