Did I already ruin it? Should I quit the hobby?

I’ve been doing scale models for about 8 months now and nothing I’ve done has been that impressive, as could be expected I suppose. But I finally felt like I had enough in me to treat myself to a more expensive kit (something more expensive than $30). I opted for the Eduard P51b Overlord kit. It was decently priced imo and I thought I had enough tools and paints to do it justice. After planning on intending to do every detail as best as possible, here I am so far. Not very happy with where I’m at to say the least considering the investment of tools, paints, airbrush, and most importantly to me, time in trying to do this all well. I should’ve done better research on the kit, that’s on me, but here I am. Got to this point and finally decided to watch some videos on it and all of peoples painting looked 1000x better, fit together better, and seemed so much more coherent to them. And they self admittedly aren’t even using the instructions? Or even using paint colors recommended? Yet their assembly/adhesion/prepping/painting/weathering seems like a breeze compared to all of the stuff I’ve done. I’ve done my homework on how to do things right yet everything still comes out so poorly for me. This work is after $100s spent on paints and tools and hundreds of how to videos. Did I already make a mess of this kit. Should I just give up at this point?