This is war - and there will be losses.That is the nature of war. You only have too see how many Turkish Leopards were destroyed in Syria, or M1 Abrahams in Iraq to see they do get "destroyed" from time to time. Tanks will be destroyed. Some mistakes will have been made. But - right now - it does not look like Ukraine has made that many mistakes.
The same pictures of destroyed western tanks and vehicles are re-appearing again and again - there is very little "new" footage appearing - suggesting these specific incidents were small and have not been repeated in other areas.
The counter offensive is in an early stage - now that the strategic pause from Ukraine is over following their successes in Kherson and Kharkiv - we will see more terrority liberated from russian occupation.
Ukraine is stronger now, then it was when it reclaimed Kherson and Kharkiv. Russia is relatively speaking, weaker now than it was at that time.
The defences that Russia has built up since, are indeed, formiddable - but they will be overcome. It will cost Ukraine for sure - but that is a known and accepted by all.
The same pictures of 3-4 Leopard tanks is irrelevant in the grand scheme of things, and those who are using those images to suggest the offensive has somehow failed, truly do not understand the depth of resourcres that have been put together for this offensive or the level of attrition they are prepared to accept to meet their objectives.
Many more Challengers, Leopards, M1A1 will be destroyed before this over, but if then we have a free independent ukraine that has reclaimed all its land - then it more a price worth paying.