No one can speak accurately for another persons actions........we can only speculate.
Agents will try to get as much house for their customers as possible and thus lean in direction of higher priced homes. Additionally, agents are aware of what percentage of the asking price, homes in your area, are selling for. So if your upper limit is $100,000, they may be showing you $110,000 homes with the understanding that the sellers will more then likely accept an offer that is in your comfort range.
But if you are incomfortable with this process, stand your ground and demand to be shown property that addresses your outlined criteria.
Don't give up....keep looking
The "Eckler Team"
If you feel that your agent won't listen and are not comfortable with your agent overall, then you need to look for another agent that you can connect with.
Look for designations, I have received my ABR-buyer's rep course , GRI,over 90 hrs of instruction in real estate, and e-pro, and Relocation certificate from Prudential , and on and on! That is so I can be the best out there to help and bring the experience of homebuying and selling to the public in the most experienced and professional manner possible-this is a job, not a hobby!
I work mostly in the Germantown, Collierville, area, also Mid-South, that is all of Memphis and surrounding counties! So if you are ever around text,email or call!! I can also give you names of experienced agents in your area! Ask your work buddies, your friends, people at church, they are not hesitate to speak up when they have a bad experience, it will maybe save you !
Since you have already attempted to use an agent in your search and have not been satisfied with their service I would suggest taking a new approach. Go to an online source for real estate like Trulia, Realtor.com or a major real estate company web site like Coldwell Banker, REMAX or one of your local brokers. Search for homes that meet your criteria and then contact the listing agent for the property. One of these listing agents may ultimately be the agent you use to help you. If not use these same web sites to search for agents specializing in your area.
Per your comment, I don't know your upper price point limit, but it is not unusual for a seller to come off their asking price by $10,000 or more. Only your agent can help you with determining a reasonable expectation for negotiating a final settlement price for the home.
Whatever you do, don't try to buy a house without an agent. Keep a positive attitude and you will be successful in finding an agent to work with you and a home that meets your needs.