Why are people blaming 2020 for things? This is a practice of jahiliyyah.

Allah says in a hadith qudsi, "The children of Adam blaspheme me by cursing time, whereas I am the time (i.e. the owner of it). All things are in My Hands, I turn the night and day."

(Bukhari and Muslim)

عن أبي هريرة رضي الله عنه قال : قال رسول الله - صلى الله عليه وسلم - : ( قال الله عز وجل : يؤذيني ابن آدم يسب الدهر ، وأنا الدهر بيدي الأمر ، أقلب الليل والنهار ) رواه البخاري ومسلم

The people of pre Islamic ignorance (jahiliyyah) used to say,

"قبح الله الدهر الذي شتت شملنا"
May Allah ruin the time (could be understood as year) that disunited us.

"لعن الله الزمان الذي جرى فيه كذا وكذا"
May Allah curse the time in which so-and-so happened.

Blaming a year for bad as if it's a bad omen could mean one of three things:

1) The year is somehow responsible for what's happening in it.
2) The year is a bad omen.
3) Blaspheme God as He is the one who runs all affairs.

All three are unacceptable and unbecoming.

Instead as believers we say,

(قُل لَّن یُصِیبَنَاۤ إِلَّا مَا كَتَبَ ٱللَّهُ لَنَا هُوَ مَوۡلَىٰنَاۚ وَعَلَى ٱللَّهِ فَلۡیَتَوَكَّلِ ٱلۡمُؤۡمِنُونَ)

"Say, ‘Only what God has decreed will happen to us. He is our Master: let the believers put their trust in God.’" (9:51)