There are a few things you can do to avoid looking like this:
Sorry for randomly taking your pictures, whoever you are, found them on Google!
... and instead look flawless, like in the mascara commercials (yes, they do all use false lashes).
♡ The first thing you do before applying any/most eye makeup is to curl your lashes, right? Well after using the eyelash curler, apply black eyeliner on the upper waterline. This will help hiding the line of both the false lashes, and the liquid eyeliner you might want to use.
♡ As mentioned, you can apply liquid black eyeliner as close to the upper lashline as possible, to make the false lash look, look more "natural". This will also hide the, sometimes very obvious, false lash line. You can apply the eyeliner all the way to the inner corner of your eye, or stop where your real eyelashes stop.
♡ When applying glue to the falsies, don't use too much, but not too little either, because you don't want the lashes to fall off during the day/evening, do you? I usually apply a little more in the ends of the lash strip. Let the glue dry for 20-30 sec.
♡ Time to put the lashes on! Use a tweezer, to get the lashes as close to your real ones as possible. I usually push the falsies and my real lashes together with the tweezer. I surely will get eyelash glue on my real lashes when doing this, but that's easy to wash off later on with the right makeup removal.
♡ Last but not least, apply some mascara, both on your real lashes and on the falsies (but just a little bit). This will make them look less shiny and fake, and more like your own lashes with mascara on.
Depending on what design you use for your falsies, the result will be differently natural looking.
If this was not very helpful, please let me know, and I will make a new tutorial with pictures to make it easier :)