Is there any chance for me to break into IB or am I screwed?

Hey fellow WSO'ers,

I am currently trying to plan my future career and I am not entirely sure whether this would work out.

About me: Eastern European with a 1st class degree from a no name UK university (major: Finance), currently in Eastern Europe working in Transaction Advisory at Deloitte (going to work for less than 1 year), planning to do MFin at a 2nd tier target/semi-target (think ESADE, SSE, St. Gallen, EDHEC, Rotterdam). No UK internships, only Eastern European ones.

I would like to work in London in BB/Boutique IB, ER, BIG4 TA or even AM (if possible).

I'm getting quite depressed coming to realise there is hardly any chance for me to break in considering the crap undergrad uni and no UK internships.

Also, when applying to junior roles, does networking actually work in UK? If so, any tips on how to expand my network?

I would appreciate whatever help and advise I can get, even if the truth is harsh please.

Thank you very much!