It is an issue. ASAT tests and cyber attacks in particular are huge concerns for space debris generation. Regular generation of space junk per launch is decreasing a lot though. Check out ESA's environmental report from last year (https://www.esa.int/Space_Safety/Space_Debris/ESA_s_Space_Environment_Report_2022). Almost every rocker body is successfully clearing LEO these days, and half of all payloads are being successfully de-orbited after end of mission.