smooth scrolling

So, i bought a pc in 2018 and back there i went to a event where i could try similar pcs to mine and were so much smoother like butter and with 0 lag and mine were not even close. I couldnt solve the problem so I replace every single component( in 2020 )thinking that will fix it but it didnt...

My old logitech T400 finally kicked the bucket yesterday. I want to replace it with something similar. I don't want a scroll wheel and the "new" t400 prices on ebay and amazon are insane. Id be willing to get a "new" t400 for around 30 bucks or so. but not the over 60 and in someplaces over 100...