I have had it for two weeks, the first week everything was fine, now it disconnects and I don't have a good connection at all

Competitive price, and seemingly good quality.
I didn't have high expectations for speeds - a small network at 100 MBps. At the 1 m length I purchased, I don't fear significant drops in speeds even over time. At these prices, you can easily replace it if it doesn't meet your needs.
But I must say that for longer lengths, I would be more concerned and would seek some additional confirmation about the actual quality and durability over time.

I will reiterate that for the price this product asks, it is excellent. The minus one star because I don't know if it will hold up over time.

Connected here for 3 years from the router to the Smart TV. It has never given me any problems

Simple cable for connecting a device to a switch at home. Initially, I wrote "Everything is good with the quality." After a little research, I see that this specific cable is CCA, which means Copper Clad Aluminum (Aluminum cable coated with copper). Essentially, it does not meet the CAT5e specifications. More details here: https://computersgr.wordpress.com/2020/09/08/kalodia-xalkos-cca-ccs-ccc/

Due to its short length, I don't think it will cause me any issues - but at the first opportunity, I will replace the three cables I bought with ones that meet the specifications.