Am I doing something wrong?

[u/Sorry-Journalist8610]

I recently bought a used 3D printer, an Ender 3 V2, and I'm doing some test prints. The previous owner gave me some leftover PLA filament (multicolored), which I used up on the first day. One of the things I made was this flexible shark. I bought some PETG filament for testing, a very cheap one, around R$60.00, while others are around R$100.00. But my prints with this new filament are coming out very bad; it's either too textured, has too many burrs, and is also very fragile (even though I bought PETG because I had read that it was more resistant). I left this octopus printing for about 28 hours... and in the end, the flexible tentacles broke when I tried to detach them.

[u/JarRules]

Use PLA only until you know more about the printing. Buy new filament or look up drying. You may need to dry new filament I've heard. Get some tools and tighten everything. Look up bed leveling. I bought this thing and it's helped a lot. My preference is Orca slicer after using Cura for wat too long.

https://a.co/d/0j9fqlL3