OP states that they have gone through "After over 300 applications, I haven't even landed a single interview." This may be a "hard" way to go, but it is certainly a way to consider to prove yourself. You can reach out directly for referrals but not just can anyone do that, you have people who game the system with AI which adds to the noise (I can imagine a simple system with Large Language Model and a Large Action Model could be easily setup to repeat the process to request referrals on LinkedIn). Not everyone can create immediate value and this isn't something obvious to consider and why I suggest OP to do so.