It's not "capitalism" turning young people to Tinder, which is dirt cheap. Capitalism as a system would much rather them start families and have lots of babies. Raising one kid yields far more purchases than a Tinder Plus subscription and a pack of prophylactics.
It is certainly not the "capitalism" strawman pushing aggressive gender politics. Most of these are based on Marxist studies, and closely associated with socialist and Marxist views and movements, that is - the opposite of capitalism.
In short, you invoked a bunch of very different problems with current American culture, bundled them together and strapped the collective label "capitalism" onto them, so now you have a single throat to cut to cure all that is ill with society. Unfortunately, it's not a single problem, and certainly does not have a single cause.
You're also ignoring agency completely. Nobody "pushed" people to use Tinder. They could keep dating seriously and getting married at 23 like they did in the 50s. They don't do that because they don't want to.