There is nothing wrong with street preaching - but there is sometimes something wrong with the way the truth is presented.

Not saying this is how you (or anyone here) does this - just making a general observation:

Condemning people is not the way - saying you are all going to Hell is a half-truth (the whole truth is, they are going to Hell if they reject the Saviour) - showing them their sin and the need for the Saviour is what will get them saved, not alienating them (ie. let the truth offend them, if they refuse to repent, rather than turn them away because you are being offensive).