There could be a lot reasons you are getting outbid. All of them are not necessarily bad. You have to trust your instincts, know the numbers and how they relate to your own personal financial situation. Sometimes deals are missed by being unwilling to spend an additional $1000.
I recently decided to pass on a home because the seller wanted $10,000 more than I thought it was worth for the risk I was taking. My decision was based on the fact the home had some significant water damage and that I would have to replace a significant portion of the structure or just tear down the home. The home was a wreck, I only had a day to decide because it was in a very desirable neighborhood, and my call was I was not willing to risk the additional money. Someone else did and they were able to salvage the home, remodel, and are in a good position on the home.
I didn't get outbid there because I didn't understand the numbers or really miss on the repairs. I got outbid (or bailed) because I wasn't in for the risk on that property. So my point is that every situation is different and you just have to feel confident in your ability to make the call on any given property and then live with the decision. As you make more offers, you will get a better feel for each property and the market.
At some point, you may find that you are making a mistake somewhere (e.g. overestimating rehab costs or undervaluing the property) or that you need to increase your tolerance for risk. But you will only know those things once you make offers.
I would note that I know that a lot of people rely on their real estate agent to provide comps and advice (which is a good idea), but I would encourage anyone who is serious in investing to personally get up to speed on property valuation. No, you will not have access to the MLS, but you do have access to the county sales data for free that includes both MLS and non-MLS sales. Most agents probably have never even searched non-MLS sales to give you valuation advice. Searching the public data should provide more sales than the MLS and give you better insights on what is happening in the specific market (e.g. sales directly between investors).
Also, if you have the ability, make cash offers. You do not have to actually have "cash" as long as you can cover the purchase price with a line of credit. Dealing with local banks has allowed me to purchase any home that I'm looking at for "cash" because they are willing to extend me a sufficient line of credit. Once you make the purchase, then you can secure long-term financing.
If you can pay "cash" write your offers with 7-10 day closings. Most title companies here can accommodate closing that fast, especially if you have an existing relationship with the firm.
Hopefully, that helps a little. In the end, have confidence in what you are doing, but be willing to adapt your strategy as you move forward.