I had issues for a hot minute with cheap braided hose in cheap no-name fittings, mainly I had leaks. Then I spent some coin for actual race-bred, tried and true kit: non-braided high PSI hose from Vibrant and fittings from Fragola (would’ve gone Vibrant but they were twice as much as Fragola per fitting, and I trust both brands). The hose was super tight into the fittings; but with a little lube, determination and elbow grease I got them all situated tight and leak free.
Buy once, cry once and pay to play ... or continue buying crap a couple times over or more when you could have done it right for the same amount you’ve spent (or less) and a lot less heartache and ass pain.