Another point KG and DPyper is that pretty well as soon as it got into service the ant-aircraft facility in the tripod was declared obsolescent. I forget the date but it was in 1940 sometime. So it's pretty well academic criticising the facility now.
The Bren did what it did best as the section machine gun. Light, portable, well respected, hard hitting, reasonably accurate, simple, reliable..... and on and on. Mere words don't do it justice