Unreadable text windows10 Dell UltraSharp U2711 27" Monitor

Need some help; I tried everything from scaling to make text fonts bigger with the win10 uttility’s. My Dell UltraSharp U2711 27" Monitor 2560 x 1440 (max) WQHD Resolution is useless. When watching a video or photo the screen is amazing. But reading text is imposible. It should be extremly sharp but the quality is buggy. Icons their borders are cutoff, fonts are behaving strange and have coloured borders. Very strange and buggy experience which causes headaches. See the picture below:

http://s31.postimg.org/yee0otpfb/buggggy.jpg

Problem solved after buying an ‘‘Display Port’’. Seemed Dvi did not work.