A lot of people lift weights for years and they really don't look much different. Now that's fine if you just want blood flow but most people who lift weights usually expect to see a little bit more results.
Many may complain about their "genetics" as an excuse for their lack of progress if they indeed wanted to make progress. But these days, arguably, most people know better. And to claim "genetics" is a bit embarrassing.
Genetics aren't the problem. You need a muscle building and shaping system in addition to a particular way of lifting a way from point A to point B then back to point A that actually grows and shapes your muscle while also increasing your strength. And before any diet or supplement program, you need a way and a system of weight lifting that first puts the demand for an optimized diet and muscle building supplementation program.