For example in bitcoin you can see projects such as lightning network that seek to increase the speed of transactions.
Besides it is not reinventing the wheel, new projects bring new advantages and benefits e.g. ethereum brought intelligent contracts which allows you to do endless things. All the projects created in ethereum have in fact contributed to the increase of bitcoin value and as new projects arise bitcoin will benefit.
You have to accept that bitcoin has many problems like the following:
1. High centralization of the mining capacity to such an extent that it is impossible for a common person to do bitcoin mining.
2. High transaction costs what makes that when buying a hamburger the commission can be higher than the same price of the hamburger, which makes the bitcoin a currency not useful for daily life, remaining only in use for investment.
3. Long waiting times to confirm transactions that in peaks reach up to 3 days.
I could go on enumerating more disadvantages of bitcoin and why new projects are necessary to make cryptocoins for daily use.
To conclude the search for a higher TPS is current and necessary for the cryptos to evolve.