Several LEDs and LED bulbs in my house are failing at the same time and way before their estimated lifespan
In North America, we have whole house surge protectors that can be installed in your electrical panel and protect everything.  I imagine you'd have something similar but need the owners permission to have it installed.   I have this one:  EATON CHSPT2MAX 120/240V Max Standard Surge Protector.  

I agree with jwh20 though - you've bought bottom of the line LED bulbs, even the LED bulbs that are top of the line I've had die around the hour rating.  

Even after the lifetime that they note LED bulbs are supposed to still be working they are just supposed to be 30% dimmer or something but in my experience the transformer kicks it well before that.  

The piece that is failing in your case is the transformer so probably cheap components.  It could be that you have surges and that this exacerbates the problem, cheaper components will probably not be as resilient.  Even the name brand Philips LED lights put a warranty of 3 hours a day for 3 years = 15,000 hours.  The led lights you've bought are cheap at $2 each or something is that the investment you are talking about?  

Even the A19 bulb from philips that i paid $30 for only lasted around 15k hours.  https://www.extremetech.com/electronics/142134-philips-revamps-mainstay-led-bulb-a19-led-is-prettier-and-more-efficient - the transformer failed.  I feel like that was an investment.  I didn't even have any surge conditions and the house wiring was less than 20 years old.  

Prices have come down though and now I can get a 3 pack of the A19 2700k for $13.  So if each bulb is $4 instead of $30 it probably pays back for the lower amount of electricity that it has used over the course of its lifetime.      

The brand name ones are - more than likely - designed to fail after the warranty hours, the ikea/chinese ones aren't even designed - they'll just fail randomly and likely before 15,000 hours.

At the cost of your specific bulbs if they last close to a year then probably you could go for a hundred years before it would be worth the cost of adding the whole house surge protector and that might not even help with the bulbs lifespan.  

Electronics in general tend to fail with heat.  Is your apartment climate controlled or subject to higher than average temperatures?

Here is an LED bulb that is around $1 USD but the prices you've paid are higher than I would have expected.